SCI 206 || QUESTIONS WITH COMPLETE
SOLUTIONS!!
Inertia correct answers - the tendency of an object to resist a change in its motion
- a body in motion tends to remain in motion; a body in rest tends to remain at rest
Motion correct answers - position: where you are
- velocity: speed with a direction
- acceleration: how fast velocity is changing
Newton's Laws correct answers 1. an object at rest will stay at rest. and a object in motion will
stay in motion unless something interferes within its path. (inertia)
2. relationship between force, mass, and acceleration (F=ma)
3. every action has a opposite and equal reaction
Gravity correct answers - A force of attraction between objects that is due to their masses
- Total Force = N-F = 0
Freefall correct answers - when the only force acting on an object is gravity
- F = mg = ma; the masses cancel out
-g=a
What is not an example of potential energy?
a) a stretched rubber band
b) a wound clock spring
c) a ball at the top of a hill
d) a moving car correct answers d) a moving car
Suppose you have two cars, with the larger one having twice the mass of the smaller one. If you
and a friend push the cars so that they have equal accelerations, how must the forces applied to
each car compare?
a) You must push equally hard on both cars to get equal accelerations.
b) You must push harder on the heavier car.
c) There is not enough information given in the problem.
d) You must push harder on the lighter car. correct answers b) You must push harder on the
heavier car.
You are bouncing up and down on a springboard (diving board), preparing to dive into the pool.
While you are in the air above the board, your acceleration is
a) upward and constant until you reach the peak, then it becomes downward and constant.
b) zero because you are not touching anything.
c) downward and constant.
SOLUTIONS!!
Inertia correct answers - the tendency of an object to resist a change in its motion
- a body in motion tends to remain in motion; a body in rest tends to remain at rest
Motion correct answers - position: where you are
- velocity: speed with a direction
- acceleration: how fast velocity is changing
Newton's Laws correct answers 1. an object at rest will stay at rest. and a object in motion will
stay in motion unless something interferes within its path. (inertia)
2. relationship between force, mass, and acceleration (F=ma)
3. every action has a opposite and equal reaction
Gravity correct answers - A force of attraction between objects that is due to their masses
- Total Force = N-F = 0
Freefall correct answers - when the only force acting on an object is gravity
- F = mg = ma; the masses cancel out
-g=a
What is not an example of potential energy?
a) a stretched rubber band
b) a wound clock spring
c) a ball at the top of a hill
d) a moving car correct answers d) a moving car
Suppose you have two cars, with the larger one having twice the mass of the smaller one. If you
and a friend push the cars so that they have equal accelerations, how must the forces applied to
each car compare?
a) You must push equally hard on both cars to get equal accelerations.
b) You must push harder on the heavier car.
c) There is not enough information given in the problem.
d) You must push harder on the lighter car. correct answers b) You must push harder on the
heavier car.
You are bouncing up and down on a springboard (diving board), preparing to dive into the pool.
While you are in the air above the board, your acceleration is
a) upward and constant until you reach the peak, then it becomes downward and constant.
b) zero because you are not touching anything.
c) downward and constant.
