Phys 2425 Final Question and answers
correctly solved 2025/2026
If the position versus time graph of an object is a horizontal line - correct answer ✔the object is at rest.
A golf club hits a golf ball with a force of 2400 N. The golf ball hits the club with a force - correct answer
✔exactly 2400 N.
An object is moving with constant velocity in a straight line. Which of the following statements is true? -
correct answer ✔The net force on the object is zero.
Suppose a ball is thrown straight up, reaches a maximum height, then falls to its initial height. Make a
statement about the direction of the velocity and acceleration as the ball is going up. - correct answer
✔Its velocity points upward and its acceleration points downward.
The metric prefix for one one-thousandth is - correct answer ✔milli.
A car of mass m goes around a banked curve of radius r with speed v. If the road is frictionless due to ice,
the car can still negotiate the curve if the horizontal component of the normal force on the car from the
road is equal in magnitude to - correct answer ✔mv^2/r.
For general projectile motion the horizontal component of a projectile's acceleration - correct answer
✔is zero.
You are trying to cross a river that flows due south with a strong current. You start out in your
motorboat on the east bank desiring to reach the west bank directly west from your starting point. -
correct answer ✔You should head your motorboat in a northwesterly direction.
, You ride on an elevator that is moving with constant downward acceleration while standing on a
bathroom scale. The reading on the scale is - correct answer ✔less than your true weight, mg.
A block of mass M slides down a frictionless plane inclined at an angle theta with the horizontal. The
normal reaction force exerted by the plane on the block is - correct answer ✔Mgcos(theta).
It's more difficult to start moving a heavy carton from rest than it is to keep pushing it with constant
velocity, because - correct answer ✔kinetic coefficient of friction is less than static coefficient of
friction.
A statement found to be experimentally valid over a wide range of observed phenomena is referred to
as a - correct answer ✔law.
When an object experiences uniform circular motion, the direction of the acceleration is directed -
correct answer ✔toward the center of the circular path.
A ball rolls off the edge of a table. The horizontal component of the ball's velocity remains constant
during its entire trajectory because - correct answer ✔the ball is not acted upon by a force in the
horizontal direction.
An elastic collision of two objects is characterized by the following: - correct answer ✔Total energy of
the system remains constant, total kinetic energy of the system remains constant, and total momentum
of the system is conserved.
The total mechanical energy of a system - correct answer ✔is constant, if only conservative forces act.
List the four fundamental forces in nature: - correct answer ✔gravitational, electromagnetic, strong
nuclear, weak nuclear.
correctly solved 2025/2026
If the position versus time graph of an object is a horizontal line - correct answer ✔the object is at rest.
A golf club hits a golf ball with a force of 2400 N. The golf ball hits the club with a force - correct answer
✔exactly 2400 N.
An object is moving with constant velocity in a straight line. Which of the following statements is true? -
correct answer ✔The net force on the object is zero.
Suppose a ball is thrown straight up, reaches a maximum height, then falls to its initial height. Make a
statement about the direction of the velocity and acceleration as the ball is going up. - correct answer
✔Its velocity points upward and its acceleration points downward.
The metric prefix for one one-thousandth is - correct answer ✔milli.
A car of mass m goes around a banked curve of radius r with speed v. If the road is frictionless due to ice,
the car can still negotiate the curve if the horizontal component of the normal force on the car from the
road is equal in magnitude to - correct answer ✔mv^2/r.
For general projectile motion the horizontal component of a projectile's acceleration - correct answer
✔is zero.
You are trying to cross a river that flows due south with a strong current. You start out in your
motorboat on the east bank desiring to reach the west bank directly west from your starting point. -
correct answer ✔You should head your motorboat in a northwesterly direction.
, You ride on an elevator that is moving with constant downward acceleration while standing on a
bathroom scale. The reading on the scale is - correct answer ✔less than your true weight, mg.
A block of mass M slides down a frictionless plane inclined at an angle theta with the horizontal. The
normal reaction force exerted by the plane on the block is - correct answer ✔Mgcos(theta).
It's more difficult to start moving a heavy carton from rest than it is to keep pushing it with constant
velocity, because - correct answer ✔kinetic coefficient of friction is less than static coefficient of
friction.
A statement found to be experimentally valid over a wide range of observed phenomena is referred to
as a - correct answer ✔law.
When an object experiences uniform circular motion, the direction of the acceleration is directed -
correct answer ✔toward the center of the circular path.
A ball rolls off the edge of a table. The horizontal component of the ball's velocity remains constant
during its entire trajectory because - correct answer ✔the ball is not acted upon by a force in the
horizontal direction.
An elastic collision of two objects is characterized by the following: - correct answer ✔Total energy of
the system remains constant, total kinetic energy of the system remains constant, and total momentum
of the system is conserved.
The total mechanical energy of a system - correct answer ✔is constant, if only conservative forces act.
List the four fundamental forces in nature: - correct answer ✔gravitational, electromagnetic, strong
nuclear, weak nuclear.
