Free Fall Problem Set #1

1.

Multiple Choice

45 sec

1 pt

A pumpkin is dropped from a 35 m building. What is its initial velocity?

9.8 m/s²

35 m

0 m/s

9.8 m/s

2.

Multiple Choice

2 mins

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 the top of its path?

about 4 seconds

about 2 seconds

about 6 seconds

about 8 seconds

3.

Multiple Choice

1 min

1 pt

Which would hit the ground first if dropped from the same height in a vacuum (no air)—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.

4.

Multiple Choice

2 mins

1 pt

A freely falling object starts from rest. After falling for 6 seconds, it will have a speed of about

5.6 m/s

29.4 m/s

58.8 m/s

294 m/s

5.

Multiple Choice

1 min

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

6.

Multiple Choice

1 min

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.

7.

Multiple Choice

1 min

1 pt

What is the acceleration of an object traveling upward during "free fall"?

+9.8 m/s²

-9.8 m/s²

9.8 m/s

-9.8 m/s

8.

Multiple Choice

1 min

1 pt

How far does an object fall in 3 seconds when dropped?

44.1 m

9.8 m

3.2 m

29.4 m

9.

Multiple Choice

2 mins

1 pt

How high does a ball travel when thrown upwards at 40 m/s?

40 m

81.6 m

392 m

1600 m

10.

Multiple Choice

2 mins

1 pt

A pumpkin is dropped from a 30 m tall building. How fast will it smash into the ground?

about 15 m/s

0 m/s

about 30 m/s

about 24 m/s

11.

Multiple Choice

2 mins

1 pt

How fast will a brick be going after it falls for 2.5 seconds?

24.5 m/s

28.5 m/s

19.8 m/s

9.8 m/s

12.

Multiple Choice

1 min

1 pt

The acceleration due to gravity near the surface of Earth is equal to

9.8 m/s

9.8 kg x m/s

9.8 N

9.8 m/s²

13.

Multiple Choice

2 mins

1 pt

A rock is thrown out of a volcano. When it started to fall, it took 9.5 seconds to hit the ground. How fast was the rock traveling as it struck the ground?

9.8 m/s

93.1 m/s

98.1 m/s

9.3 m/s

14.

Multiple Choice

2 mins

1 pt

A plane is flying at 9000 m when one bolt works its way loose and falls to the ground. How long did it take to hit the ground?

55.0 s

49.2 s

45.9 s

42.9 s

15.

Multiple Choice

2 mins

1 pt

A pebble is dropped from rest at a certain height. Find the height from which the pebble is dropped if it reaches the ground 2.0s after it has been released?

about 5 m

about 10 m

about 15 m

about 20 m

16.

Multiple Choice

2 mins

1 pt

A 5-kg rock and 10-kg rock are dropped from the same height. If it takes the 5-kg rock a time t to reach the ground, if there is no air resistance ,what time will it take the 10-kg rock to reach the ground?

the 5Kg will reach the ground first

the 10Kg will reach the ground first

both rocks will reach at the same time

the answer is unpredictable

17.

Multiple Choice

1 min

1 pt

Which would hit the ground first if dropped from the same height on Earth—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.

18.

Multiple Choice

15 mins

1 pt

Cheerleaders perform a basket toss throwing Morgan up into the air. If Morgan is caught 1.2 s later, how high did Morgan fly?

2.94 m

7.06 m

1.76 m

5.88 m

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