Question 1

A book is at rest on a table in a moving train. Which of the following statements is correct regarding the book's motion?

Accepted Answer

The book is at rest relative to the train but moving relative to the ground.

Question 2

A mosquito wants to hover above you for lunch while you rest in a hammock in a 3 m/s breeze. What must the mosquito do?

Accepted Answer

Fly at 3 m/s into the breeze to remain stationary relative to you.

Question 3

A car travels 240 km in 4 hours. What is its average speed?

Accepted Answer

$$60\ \mathrm{km/h}$$

Question 4

Which of the following best describes velocity?

Accepted Answer

Speed in a given direction

Question 5

A car moves at a constant speed of $$20\ \mathrm{m/s}$$ around a circular track. Which statement is true?

Accepted Answer

The car's velocity is changing because its direction is changing.

Question 6

Which of the following is a vector quantity?

Accepted Answer

Velocity

Question 7

A car increases its speed from $$35\ \mathrm{km/h} to$$ $$50\ \mathrm{km/h} in$$ $$3$$ seconds. What is its acceleration?

Accepted Answer

$$5\ \mathrm{km/h\cdot s}$$

Question 8

Which of the following actions in a car does NOT result in acceleration?

Accepted Answer

Maintaining a constant speed in a straight line

Question 9

A rock is dropped from rest and falls freely under gravity. What is its speed after $$4$$ seconds? (Assume $$g = 10\ \mathrm{m/s^2$})$$

Accepted Answer

$$40\ \mathrm{m/s}$$

Question 10

How far does an object in free fall travel in the first $$3$$ seconds? (Assume $$g = 10\ \mathrm{m/s^2$})$$

Accepted Answer

$$45\ \mathrm{m}$$

Question 11

Which equation correctly relates the distance $$d$$ fallen from rest under constant acceleration $$g$$ after time $$t$$?

Accepted Answer

$$d = \frac{1}{2}gt^2$

Question 12

A car's speedometer reads $$60\ \mathrm{km/h} as it $$travels north. Another car passes by traveling south at $$60\ \mathrm{km/h}. $$Which is true?

Accepted Answer

Both cars have the same speed but opposite velocities.

Question 13

Which of the following best describes the slope of a speed-versus-time graph for a freely falling object?

Accepted Answer

Acceleration

Question 14

A feather and a coin are dropped in a vacuum. What happens?

Accepted Answer

They fall with the same acceleration.

Question 15

A car accelerates from rest at $$2\ \mathrm{m/s^2$}. $$How far does it travel in $$5$$ seconds?

Accepted Answer

$$25\ \mathrm{m}$$

Question 16

Which of the following is NOT a legitimate unit for speed?

Accepted Answer

$$\mathrm{$$meters/second^2$$}$$

Question 17

A car's odometer reads $$0 at $$the start of a trip and $$35\ \mathrm{km}$$ after $$0.5$$ hours. What is the average speed?

Accepted Answer

$$70\ \mathrm{km/h}$$

Question 18

Which of the following statements about acceleration is correct?

Accepted Answer

Acceleration can be caused by a change in speed, direction, or both.

Question 19

If a rock falls from a cliff and hits the ground in $$2$$ seconds, what is its speed upon impact? (Assume $$g = 10\ \mathrm{m/s^2$})$$

Accepted Answer

$$20\ \mathrm{m/s}$$

Question 20

Which of the following best describes the relationship between distance and time for a freely falling object?

Accepted Answer

Distance is proportional to the square of the time.

Kinematics: Motion in One Dimension – Study Notes

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