Question 1

A car travels 150 km in 3 hours. What is its average speed?

Accepted Answer

$$50\ \mathrm{km/h}$$

Question 2

Which of the following statements best describes velocity?

Accepted Answer

Velocity is the rate at which position changes over time, including direction.

Question 3

A runner completes one lap around a 400 m track in 50 seconds, ending where she started. What is her average velocity?

Accepted Answer

$$0\ \mathrm{m/s}$$

Question 4

A car increases its speed from $$20\ \mathrm{m/s} to$$ $$30\ \mathrm{m/s} in$$ $$2\ \mathrm{s}. $$What is its average acceleration?

Accepted Answer

$$2.5\ \mathrm{m/s^2$}$$

Question 5

Which of the following scenarios describes an object that is accelerating?

Accepted Answer

Both B and C.

Question 6

A ball is dropped from rest. What is its speed after $$3\ \mathrm{s} of $$free fall (neglecting air resistance)?

Accepted Answer

$$30\ \mathrm{m/s}$$

Question 7

How far does a freely falling object fall from rest in $$2\ \mathrm{s} ($$neglecting air resistance)?

Accepted Answer

$$20\ \mathrm{m}$$

Question 8

A plane flies east at $$80\ \mathrm{km/h}$$ while a crosswind blows north at $$60\ \mathrm{km/h}. $$What is the plane's speed relative to the ground?

Accepted Answer

$$100\ \mathrm{km/h}$$

Question 9

If you run horizontally at $$4\ \mathrm{m/s} in $$rain that falls vertically at $$4\ \mathrm{m/s}$$, what is the magnitude of the velocity of the raindrops relative to you?

Accepted Answer

$$5.7\ \mathrm{m/s}$$

Question 10

A stone is dropped from a cliff and falls freely for $$4\ \mathrm{s}. $$How far does it fall?

Accepted Answer

$$80\ \mathrm{m}$$

Question 11

Which of the following best describes the difference between speed and velocity?

Accepted Answer

Speed has magnitude only, velocity has magnitude and direction.

Question 12

A car travels $$60\ \mathrm{km} in$$ $$2\ \mathrm{h}. $$What is its average speed?

Accepted Answer

$$30\ \mathrm{km/h}$$

Question 13

Which of the following is NOT an example of acceleration?

Accepted Answer

A car moving at constant speed in a straight line.

Question 14

A ball is thrown straight up with an initial speed of $$20\ \mathrm{m/s}. $$What is its speed after $$2\ \mathrm{s} ($$neglecting air resistance)?

Accepted Answer

$$0\ \mathrm{m/s}$$

Question 15

Which of the following quantities is a vector?

Accepted Answer

Velocity

Question 16

A car's velocity changes from $$15\ \mathrm{m/s} to$$ $$5\ \mathrm{m/s} in$$ $$2\ \mathrm{s}. $$What is its acceleration?

Accepted Answer

$$-10\ \mathrm{m/s^2$}$$

Question 17

Which of the following best describes free fall?

Accepted Answer

An object falling under the influence of gravity only.

Question 18

A car travels $$100\ \mathrm{km}$$ north and then $$100\ \mathrm{km}$$ south in $$4\ \mathrm{h}. $$What is its average velocity?

Accepted Answer

$$0\ \mathrm{km/h}$$

Question 19

Which of the following is true about acceleration and velocity?

Accepted Answer

Both are rates, but for different quantities.

Linear Motion: Physics with Calculus Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard