Chapter 3: Linear Motion
10 Questions
| Total Attempts: 1152
Questions and Answers
- 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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