# Chapter 3: Linear Motion

55 Questions | Attempts: 1292
Share  Settings  • 1.
The two measurements necessary for calculating average speed are
• A.

Acceleration and time

• B.

Velocity and time

• C.

Distance and time

• D.

Distance and acceleration

• E.

Velocity and distance

• 2.
A horse gallops a distance of 10 kilometers in a time of 30 minutes. Its average speed is
• A.

15 km/h

• B.

20 km/h

• C.

30 km/h

• D.

40 km/h

• 3.
A car maintains a constant velocity of 100 km/hr for 10 seconds. During this interval its acceleration is
• A.

Zero

• B.

10 km/hr

• C.

110 km/hr

• D.

1000 km/hr

• 4.
While an object near the Earth's surface is in free fall, its
• A.

Velocity increases

• B.

Acceleration increases

• C.

Mass increases

• D.

Mass decreases

• 5.
A hockey puck is set in motion across a frozen pond. If ice friction and air resistance are neglected, the force required to keep the puck sliding at constant velocity is
• A.

Zero

• B.

Equal to its weight

• C.

Equal to its weight divided by its mass

• D.

Equal to the product of its mass times its weight

• 6.
An object at rest near the surface of a distant planet starts to fall freely. If the acceleration there is twice that of the Earth, its speed one second later would be
• A.

10 m/s

• B.

20 m/s

• C.

30 m/s

• D.

40 m/s

• 7.
If an object falling freely were somehow equipped with an odometer to measure the distance it travels, then the amount of distance it travels each succeeding second would be
• A.

Constant

• B.

Less and less each second

• C.

Greater than the second before

• D.

Doubled

• 8.
If a freely falling object were somehow equipped with a speedometer, its speed reading would increase each second by about
• A.

5 m/s

• B.

10 m/s

• C.

15 m/s

• D.

A variable amount

• E.

Depends on its initial speed

• 9.
If a freely falling object were somehow equipped with a speedometer on a planet where the acceleration due to gravity is 20 m/s/s, then its speed reading would increase each second by
• A.

10 m/s

• B.

20 m/s

• C.

30 m/s

• D.

40 m/s

• E.

Depends on its initial speed

• 10.
Twelve seconds after starting from rest, an object falling freely will have a speed of
• A.

10 m/s

• B.

50 m/s

• C.

100 m/s

• D.

More than 100 m/s

• 11.
If an object moves with constant acceleration, its velocity must
• A.

Be constant also

• B.

Change by the same amount each second

• C.

Change by varying amounts depending on its speed

• D.

Always decrease

• 12.
If a car increases its velocity from zero to 60 km/h in 10 seconds, its acceleration is
• A.

3 km/h/s

• B.

6 km/h/s

• C.

10 km/h/s

• D.

60 km/h/s

• E.

600 km/h/s

• 13.
If a rocket initially at rest accelerates at a rate of 50 m/s2 for one minute, its speed will be
• A.

50 m/s

• B.

500 m/s

• C.

3000 m/s

• D.

3600 m/s

• 14.
An apple falls from a tree and hits the ground 5 meters below. It hits the ground with a speed of about
• A.

5 m/s

• B.

10 m/s

• C.

15 m/s

• D.

20 m/s

• E.

Not enough information given to estimate

• 15.
It takes 6 seconds for a stone to fall to the bottom of a mine shaft. How deep is the shaft?
• A.

• B.

• C.

• D.

More than 200 m

• 16.
In each second of fall, the distance a freely falling object will fall is
• A.

• B.

• C.

The same, but not 5 m or 10 m

• D.

Increasing

• E.

None of these

• 17.
A car accelerates at 2 meters/s/s. Assuming the car starts from rest, how far will it travel in 10 s?
• A.

2 m

• B.

10 m

• C.

40 m

• D.

100 m

• E.

200 m

• 18.
Drop a rock from a 5-m height and it accelerates at 10 m/s2 and strikes the ground 1 s later. Drop the same rock from a height of 2.5 m and its acceleration of fall is about
• A.

Half as much

• B.

The same amount

• C.

Twice as much

• D.

Four times as much

• 19.
A ball tossed vertically upward rises, reaches its highest point, and then falls back to its starting point. During this time the acceleration of the ball is always
• A.

In the direction of motion

• B.

Opposite its velocity

• C.

Directed upward

• D.

Directed downward

• 20.
While a car travels around a circular track at a constant speed, its
• A.

Acceleration is zero

• B.

Velocity is zero

• C.

Inertia is zero

• D.

None of the above

• 21.
If a car accelerates from rest at 2 meters per second per second, its speed 3 seconds later will be about
• A.

2 m/s

• B.

3 m/s

• C.

4 m/s

• D.

6 m/s

• 22.
A ball is thrown upwards and returns to the same position. Compared with its original speed after release, its speed when it returns is about
• A.

Half as much

• B.

The same

• C.

Twice as much

• D.

Four times as much

• 23.
An object covers a distance of 8 meters in the first second of travel, another 8 meters during the next second, and 8 meters again during the third second. Its acceleration in meters per second per second is approximately
• A.

0

• B.

5

• C.

8

• D.

24

• 24.
At one instant an object in free fall is moving downward at 50 meters per second. One second later its speed should be about
• A.

25 m/s

• B.

50 m/s

• C.

55 m/s

• D.

60 m/s

• E.

100 m/s

• 25.
At one instant a heavy object in air is moving upward at 50 meters per second. One second later its speed is approximately
• A.

40 m/s

• B.

50 m/s

• C.

55 m/s

• D.

60 m/s

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