What is the distance a ball falls after 1,2,3,4,5 seconds (assume g is rounded to 10 m/s2)?
10, 20, 30, 40, 50 m (meters)
5, 20, 45, 80,125 m (meters)
5, 10,15, 20, 25 m (meters)
10, 25, 60, 90,120 m (meters)
2. Multiple Choice
30 seconds
1 pt
What is the velocity of a ball that has been dropped off a cliff after 1 , 2, 3, 4, and 5 seconds? (assume g is rounded to 10 m/s2)?.
10, 20, 30, 40, 50 m/s
5, 10, 15, 20, 25 m/s
5, 20, 45, 80,125 m
10,10,10,10,10 m/s
3. Multiple Choice
30 seconds
1 pt
What is the acceleration of a ball that is dropped off the side of a cliff after 1,2,3,4,5 seconds? (assume g is rounded to 10 m/s2)
5,10,15, 20, 25 m/s2
10, 20, 30, 40, 50 m/s2
5, 20, 45, 80, 125 m/s2
10,10,10,10,10 m/s2
4. Multiple Choice
30 seconds
1 pt
A ball is thrown upward in the air with an initial velocity of 40 m/s. How long does it take to reach back to the point it was thrown from?
4 seconds
2 seconds
6 seconds
8 seconds
5. Multiple Choice
30 seconds
1 pt
A ball is thrown up in the air with an initial velocity of 40 m/s. What is the ball's velocity after 2 seconds?
0 m/s
20 m/s traveling upward
20 m/s traveling downward
40 m/s traveling downward
6. Multiple Choice
30 seconds
1 pt
A ball is thrown up in the air with an initial velocity of 40 m/s. What is the ball's velocity after 6 seconds?
20 m/s traveling upward.
10 m/s traveling downward.
20 m/s traveling downward.
30 m/s traveling downward.
7. Multiple Choice
30 seconds
1 pt
If you know the time an object is in the air, can you find the Vf of the object?
Yes, you would have to halve the time since the Ttotal is for both rise and fall and you would have to calculate the height the object rose before finding the Vf
Yes, you would use the time the object was in the air to find the distance the object travels upward before
No, you are not given enough information
No, it depends on the acceleration, which is different on the way up and on the way down.
8. Multiple Choice
30 seconds
1 pt
The change in velocity in a given time period is?
Vi
Vf
a
d
9. Multiple Choice
30 seconds
1 pt
When speed and direction remain the same throughout a motion, this is called?
Accelerated motion
Constant motion
Changing motion
Changing velocity
10. Multiple Choice
30 seconds
1 pt
When an object falls in physics world, what happens?
It accelerates at a constant rate until it hits the ground
It accelerates at a non-constant rate until it hits the ground
It accelerates at a constant rate until it reaches terminal velocity
It accelerates at a non-constant rate until it reaches terminal velocity
11. Multiple Choice
1 minute
1 pt
Which of the following statements applies to the motion of a ball rising and then falling in free fall? I. The ball has constant acceleration as it moves upward. II. The ball has constant acceleration at the top of its path. III. The ball has constant acceleration as it moves downward.
I only
III only
I and III
I, II, and III
12. Multiple Choice
30 seconds
1 pt
A baseball catcher throws a ball vertically upward and catches it in the same spot as it returns to the mitt. At what point in the ball’s path does it experience zero velocity and nonzero acceleration at the same time?
midway on the way up
at the top of its path
the instant it leaves the catcher’s hand
the instant before it arrives in the catcher’s mitt
13. Multiple Choice
30 seconds
1 pt
Which would hit the ground first if dropped from the same height in a vacuum—a feather or a metal bolt?
the feather
the metal bolt
They would hit the ground at the same time.
They would be suspended in a vacuum.
14. Multiple Choice
30 seconds
1 pt
Which would fall with greater acceleration in a vacuum—a leaf or a stone?
the leaf
the stone
They would accelerate at the same rate.
It is difficult to determine without more information.
15. Multiple Choice
30 seconds
1 pt
Suppose you are in a car that is going around a curve. The speedometer reads a constant 30 miles per hour. Which of the following is NOT true?
You and the car are accelerating.
Your acceleration is constantly changing.
Your velocity is constant.
Your direction is constantly changing.
16. Multiple Choice
30 seconds
1 pt
If a freely falling object were somehow equipped with a speedometer, its speed reading would increase each second by
about 5 m/s.
about 10 m/s.
about 15 m/s.
a rate that depends on its initial speed.
17. Multiple Choice
1 minute
1 pt
A freely falling object starts from rest. After falling for 6 seconds, it will have a speed of about
6m/s
30m/s
60m/s
300m/s
18. Multiple Choice
2 minutes
1 pt
1. An object free falls for 3.5 seconds. How far does it fall?
120.05 m
17.15 m
60.03 m
34.3 m
19. Multiple Choice
30 seconds
1 pt
1. An object free falls for 3.5 seconds. Given only this information, what equation is used to find the speed?
v=gt
v=d/t
20. Multiple Choice
5 minutes
1 pt
If you throw a baseball straight up, what is its velocity at the highest point?
9.8 m/s2
9.8 m/s
0 m/s2
0 m/s
21. Multiple Choice
30 seconds
1 pt
A ball is thrown upwards and caught when it comes back down. In the absence of air resistance, the speed of the ball when caught would be
less than the speed it had when thrown upwards.
more than the speed it had when thrown upwards.
the same as the speed it had when thrown upwards.
22. Multiple Choice
30 seconds
1 pt
An object accelerates at 2 m/s2. Assuming the object starts from rest, how much time does it need to accelerate to a speed of 16 m/s?
4 s
8 s
16 s
1/16 s
23. Multiple Choice
1 minute
1 pt
A freely falling object starts from rest. After falling for 6 seconds, it will have a speed of about:
6m/s
30m/s
60m/s
300m/s
24. Multiple Choice
30 seconds
1 pt
Which of the following situations represents a negative displacement? (Assume positive position is measured vertically upward along a y-axis.)
A cat stands on a tree limb.
A cat jumps from the ground onto a tree limb.
A cat jumps from a lower tree limb to a higher one.
A cat jumps from a tree limb to the ground.
25. Multiple Choice
30 seconds
1 pt
When there is no air resistance, objects of different masses dropped from rest
fall with equal accelerations and with equal displacements.
fall with different accelerations and with different displacements.
fall with equal accelerations and with different displacements.
fall with different accelerations and with equal displacements.
26. Multiple Choice
30 seconds
1 pt
Objects that are falling toward Earth in free fall move
faster and faster.
slower and slower.
at a constant velocity.
slower then faster.
27. Multiple Choice
30 seconds
1 pt
In the absence of air resistance, objects fall at constant
speed
velocity
acceleration
distances each successive second.
28. Multiple Choice
30 seconds
1 pt
A ball is thrown upwards and caught when it comes back down. In the absence of air resistance, the speed of the ball when caught would be