# Chapter 3: Linear Motion

10 Questions | Total Attempts: 1194  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

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