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- 1. Multiple Choice
When throwing a ball straight up, which of the following is true about its velocity (v) and its acceleration (a) at the highest point in its path?
both v = 0 and a = 0
v does not = 0, but a =0
v = 0, but a does not = 0
both v and a do not = 0
- 2. Multiple Choice
You throw a ball straight up in the air. After it leaves your hand, at what point in its flight does it have the maximum value of ACCELERATION?
It's acceleration is constant everywhere
at the top of it's trajectory
halfway up the top of its trajectory
just after it leaves your hand
just before it returns to your hand on the way down
- 3. Multiple Choice
Alice and Bill are at the top of a building. Alice throws her ball downward. Bill simply drops his ball. Which ball has the greater ACCELERATION just after release?
Alice's ball
it depends on how hard the ball was thrown
neither - they both have the same acceleration
Bill's ball
- 4. Multiple Choice
You throw a ball upward with an initial speed of 10 m/s. Assuming that there is no air resistance, what is its speed when it returns to you? (Hint: Symmetry)
more than 10 m/s
10 m/s
less than 10 m/s
zero
- 5. Multiple Choice
______________________ is any motion of an object where gravity is the only force acting upon it.
kinematics
mechanics
free fall
velocity
- 6. Multiple Choice
The accepted (or standard) acceleration due to gravity on Earth, when neglecting air resistance is:
9.8 m/s
9.8 m/s2
9.8 m
9.8 s
- 7. Multiple Choice
Do free falling objects move at a constant velocity, or do they accelerate?
Falling objects accelerate at -9.8 m/s2
Falling objects accelerate at 100 m/s2
Falling objects move at a constant velocity
It depends on the mass
- 8. Multiple Choice
A textbook is dropped from a second floor window and falls to the ground. What happens to the velocity as the book falls to the ground?
the velocity increases
the velocity remains constant
the velocity decreases
- 9. Multiple Choice
A textbook is dropped from a second floor window and falls to the ground. What happens to the acceleration as the book falls to the ground?
the acceleration increases
the acceleration remains constant
the acceleration decreases
- 10. Multiple Choice
If an object is dropped and falling to the ground, are the velocity and acceleration of the object in the same or opposite direction?
same
opposite
perpendicular
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