LIFEGUARD INSTRUCTOR COURSE |QUESTIONS & ANSWERS
VERIFIED SOLUTIONS 100%|GRADE A+|LATEST 2024/2025
Under which circumstance is there a force exerted on the apple by your hand? -✔✔✔When you are
picking the apple up off of the floor
Newtons and pounds are __________. -✔✔✔different units for measuring force
Which of the following is a legitimate way to describe the force between a skydiver and the air she is
falling through as the skydiver is falling toward the ground? -✔✔✔The drag force exerted by the air
on the skydiver
If you know all of the forces acting on an object and you know the mass of that object, what
quantities can you figure out from that information? -✔✔✔The acceleration of the object
Which of the following is a legitimate way to describe the force between a road and a car driving on
the road? -✔✔✔The normal force exerted by the road on the car
Blocks A and B have equal masses and are connected by a rope that passes over a frictionless pulley,
as shown. At this moment, the system is at rest. Compare the magnitudes of the force of tension
exerted on block A and the force of tension exerted on block B. -✔✔✔The force of tension exerted
on block A is equal in magnitude to the force of tension exerted on block B.
Consider a car speeding up as it drives along a level road. Which of the following is an action-reaction
pair (from Newton's third law)? -✔✔✔The normal force exerted on the car by the road and the
downward force exerted on the road by the car.
Josh punches his open left hand with his right hand. Which statement is true about the forces his two
hands exert on each other? -✔✔✔Josh's right hand and left hand exert equal and opposite forces on
each other
Blocks A and B have equal masses and are connected by a rope that passes over a frictionless pulley,
as shown. At this moment, the system is in motion, with block B moving downward and A moving
upward at a constant speed. Compare the magnitudes of the force of tension exerted on block A and
the force of tension exerted on block B. -✔✔✔The force of tension exerted on block A is equal in
magnitude to the force of tension exerted on block B.
,Miguel leans against a wall. Which statement is true about the forces Miguel and the wall exert on
each other? -✔✔✔Miguel and the wall exert equal and opposite forces on each other.
A block of mass M is attached to a modified Atwood machine and is accelerated upward at 3a by a
constant force
𝐹0
. What is the weight of the block? -✔✔✔Mg
Which of the following is a valid force that could be exerted on a baseball? -✔✔✔The force on a
baseball being hit by a bat
Imagine a car sitting empty in the parking lot. Which of the following is the most complete list of the
forces that belong on a free-body diagram (FBD) of the car? -✔✔✔The normal force on your car by
the pavement it rests on and the force of gravity on your car by the earth
If you could somehow increase the mass of an object, what would happen to the net force on the
object? -✔✔✔The net force on an object doesn't depend on the object's mass.
Which of these is a valid force that could be exerted on a car racing through narrow city streets? -
✔✔✔The force of friction between the road and the car (its tires)
A person is standing still while leaning against the wall in a classroom. Which is the best answer
regarding the number of forces exerted on her? -✔✔✔At least four
Cortni pulls on a rope that is attached to a large crate. She is pulling the crate along at a constant
speed as it slides across rough carpet. How does the magnitude of the force of tension exerted on
Cortni compare to the magnitude of the force of tension exerted on the crate? -✔✔✔The force of
tension exerted on the crate has the same magnitude as the force of tension exerted on Cortni.
Floating in deep space, you find yourself at rest next to a small asteroid. You reach out and tap the
asteroid with a hammer. What happens to you in this process? -✔✔✔You will briefly accelerate away
from the asteroid and then drift away at a constant speed.
, In the figure, a hand is pushing on block B to the right, causing both blocks to move to the right
across a rough surface at a constant speed. Compare the force that pushes block B to the right to the
force that pushes block A to the right. -✔✔✔The force that pushes block A to the right is smaller
than the force that pushes block B to the right.
A person is trying to pull a heavy crate across a room with a rope that is attached to the crate, but it
doesn't move. The tension in the rope ________________. -✔✔✔is equal at both ends of the rope
Blocks A and B have equal masses and are connected by a rope that passes over a frictionless pulley,
as shown. At this moment, the system is in motion, with block B moving downward and A moving
upward at a constant speed. Compare the magnitudes of the force of tension exerted on block A and
the force of tension exerted on block B. -✔✔✔The force of tension exerted on block A is equal in
magnitude to the force of tension exerted on block B.
Blocks A and B are connected by rope 1 and are pulled at constant speed across a rough surface by
rope 2, which is attached to block B, as shown. Compare the magnitude of the tensions in ropes 1
and 2. -✔✔✔The magnitude of the tensions in the two ropes will not be equal.
Students connect a spring scale to a block on a rough horizontal surface. The students use the spring
scale to measure the magnitude of the horizontal force needed to pull the block at a constant speed.
Which of the following statements explains why two forces exerted between objects are equal in
magnitude? -✔✔✔The frictional forces that the block and the surface exert on each other, because
objects always exert forces of equal magnitude on each other.
If the mass of block B is 2 kg, the gravitational force exerted on block B is most nearly which of the
following? -✔✔✔20 N
A spring-loaded launcher has a mass of 0.60 kg and is placed on a platform 1.2 m above the ground.
The force of friction is negligible between the platform and the launcher. The launcher fires a 0.30 kg
ball that lands a distance D to the right of the platform, as shown in the diagram above. Which of the
following explanations is true? -✔✔✔The launcher will fall off the platform and land LaTeX:
\frac{D}{2}𝐷2 to the left of the platform because the launcher is twice the mass of the ball.
A satellite orbits Earth. The only force on the satellite is the gravitational force exerted by Earth. How
does the satellite's acceleration compare to the gravitational field at the location of the satellite?
Select two answers. -✔✔✔- The magnitudes of the acceleration and the gravitational field strength
are equal.
- The gravitational field and the acceleration point in the same direction.
VERIFIED SOLUTIONS 100%|GRADE A+|LATEST 2024/2025
Under which circumstance is there a force exerted on the apple by your hand? -✔✔✔When you are
picking the apple up off of the floor
Newtons and pounds are __________. -✔✔✔different units for measuring force
Which of the following is a legitimate way to describe the force between a skydiver and the air she is
falling through as the skydiver is falling toward the ground? -✔✔✔The drag force exerted by the air
on the skydiver
If you know all of the forces acting on an object and you know the mass of that object, what
quantities can you figure out from that information? -✔✔✔The acceleration of the object
Which of the following is a legitimate way to describe the force between a road and a car driving on
the road? -✔✔✔The normal force exerted by the road on the car
Blocks A and B have equal masses and are connected by a rope that passes over a frictionless pulley,
as shown. At this moment, the system is at rest. Compare the magnitudes of the force of tension
exerted on block A and the force of tension exerted on block B. -✔✔✔The force of tension exerted
on block A is equal in magnitude to the force of tension exerted on block B.
Consider a car speeding up as it drives along a level road. Which of the following is an action-reaction
pair (from Newton's third law)? -✔✔✔The normal force exerted on the car by the road and the
downward force exerted on the road by the car.
Josh punches his open left hand with his right hand. Which statement is true about the forces his two
hands exert on each other? -✔✔✔Josh's right hand and left hand exert equal and opposite forces on
each other
Blocks A and B have equal masses and are connected by a rope that passes over a frictionless pulley,
as shown. At this moment, the system is in motion, with block B moving downward and A moving
upward at a constant speed. Compare the magnitudes of the force of tension exerted on block A and
the force of tension exerted on block B. -✔✔✔The force of tension exerted on block A is equal in
magnitude to the force of tension exerted on block B.
,Miguel leans against a wall. Which statement is true about the forces Miguel and the wall exert on
each other? -✔✔✔Miguel and the wall exert equal and opposite forces on each other.
A block of mass M is attached to a modified Atwood machine and is accelerated upward at 3a by a
constant force
𝐹0
. What is the weight of the block? -✔✔✔Mg
Which of the following is a valid force that could be exerted on a baseball? -✔✔✔The force on a
baseball being hit by a bat
Imagine a car sitting empty in the parking lot. Which of the following is the most complete list of the
forces that belong on a free-body diagram (FBD) of the car? -✔✔✔The normal force on your car by
the pavement it rests on and the force of gravity on your car by the earth
If you could somehow increase the mass of an object, what would happen to the net force on the
object? -✔✔✔The net force on an object doesn't depend on the object's mass.
Which of these is a valid force that could be exerted on a car racing through narrow city streets? -
✔✔✔The force of friction between the road and the car (its tires)
A person is standing still while leaning against the wall in a classroom. Which is the best answer
regarding the number of forces exerted on her? -✔✔✔At least four
Cortni pulls on a rope that is attached to a large crate. She is pulling the crate along at a constant
speed as it slides across rough carpet. How does the magnitude of the force of tension exerted on
Cortni compare to the magnitude of the force of tension exerted on the crate? -✔✔✔The force of
tension exerted on the crate has the same magnitude as the force of tension exerted on Cortni.
Floating in deep space, you find yourself at rest next to a small asteroid. You reach out and tap the
asteroid with a hammer. What happens to you in this process? -✔✔✔You will briefly accelerate away
from the asteroid and then drift away at a constant speed.
, In the figure, a hand is pushing on block B to the right, causing both blocks to move to the right
across a rough surface at a constant speed. Compare the force that pushes block B to the right to the
force that pushes block A to the right. -✔✔✔The force that pushes block A to the right is smaller
than the force that pushes block B to the right.
A person is trying to pull a heavy crate across a room with a rope that is attached to the crate, but it
doesn't move. The tension in the rope ________________. -✔✔✔is equal at both ends of the rope
Blocks A and B have equal masses and are connected by a rope that passes over a frictionless pulley,
as shown. At this moment, the system is in motion, with block B moving downward and A moving
upward at a constant speed. Compare the magnitudes of the force of tension exerted on block A and
the force of tension exerted on block B. -✔✔✔The force of tension exerted on block A is equal in
magnitude to the force of tension exerted on block B.
Blocks A and B are connected by rope 1 and are pulled at constant speed across a rough surface by
rope 2, which is attached to block B, as shown. Compare the magnitude of the tensions in ropes 1
and 2. -✔✔✔The magnitude of the tensions in the two ropes will not be equal.
Students connect a spring scale to a block on a rough horizontal surface. The students use the spring
scale to measure the magnitude of the horizontal force needed to pull the block at a constant speed.
Which of the following statements explains why two forces exerted between objects are equal in
magnitude? -✔✔✔The frictional forces that the block and the surface exert on each other, because
objects always exert forces of equal magnitude on each other.
If the mass of block B is 2 kg, the gravitational force exerted on block B is most nearly which of the
following? -✔✔✔20 N
A spring-loaded launcher has a mass of 0.60 kg and is placed on a platform 1.2 m above the ground.
The force of friction is negligible between the platform and the launcher. The launcher fires a 0.30 kg
ball that lands a distance D to the right of the platform, as shown in the diagram above. Which of the
following explanations is true? -✔✔✔The launcher will fall off the platform and land LaTeX:
\frac{D}{2}𝐷2 to the left of the platform because the launcher is twice the mass of the ball.
A satellite orbits Earth. The only force on the satellite is the gravitational force exerted by Earth. How
does the satellite's acceleration compare to the gravitational field at the location of the satellite?
Select two answers. -✔✔✔- The magnitudes of the acceleration and the gravitational field strength
are equal.
- The gravitational field and the acceleration point in the same direction.
