Question 1

Which of the following is a vector quantity?

Accepted Answer

Velocity

Question 2

A car travels 100 km east in 2 hours, then 50 km west in 1 hour. What is the car's average velocity over the entire trip?

Accepted Answer

$$16.7\ \mathrm{km/h}$$ east

Question 3

Which of the following best describes the difference between displacement and distance?

Accepted Answer

Distance is the total path length traveled, displacement is the straight-line change in position.

Question 4

A runner completes one lap around a 400 m track in 80 seconds, ending at the starting point. What is the runner's average velocity?

Accepted Answer

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

Question 5

Which equation correctly gives the average acceleration $$\bar{a}$$ over a time interval?

Accepted Answer

$$\bar{a} = \frac{v_f - v_i}{t_f - t_i}$$

Question 6

A car accelerates from rest at $$4.0\ \mathrm{m/s^2$}$$ for $$6.0\ \mathrm{s}. $$What is its final velocity?

Accepted Answer

$$24\ \mathrm{m/s}$$

Question 7

Which of the following is NOT a base SI unit?

Accepted Answer

Newton (N)

Question 8

A swimmer swims 50 m east in 24 s, then immediately swims 50 m west in 24 s. What is the swimmer's average speed and average velocity for the entire trip?

Accepted Answer

Average speed: $$2.08\ \mathrm{m/s}$$, Average velocity: $$0\ \mathrm{m/s}$$

Question 9

If a car moves with constant acceleration, which of the following equations is valid?

Accepted Answer

$$v = v_0$ + a t$$

Question 10

A ball is thrown straight up with an initial velocity of $$10\ \mathrm{m/s}. $$What is its velocity after $$2\ \mathrm{s}$$? (Assume $$g = 9.8\ \mathrm{m/s^2$}$$ downward.)

Accepted Answer

$$-9.6\ \mathrm{m/s}$$

Question 11

Which of the following statements about vectors is correct?

Accepted Answer

Vectors have both magnitude and direction.

Question 12

A car starts from rest and accelerates uniformly at $$3\ \mathrm{m/s^2$}$$ for $$8\ \mathrm{s}. $$How far does it travel in this time?

Accepted Answer

$$96\ \mathrm{m}$$

Question 13

Which of the following is the correct SI unit for acceleration?

Accepted Answer

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

Question 14

A train moves from $$x_i = 10\ \mathrm{m} to$$ $$x_f = 30\ \mathrm{m} in$$ $$4\ \mathrm{s}. $$What is its average velocity?

Accepted Answer

$$5\ \mathrm{m/s}$$

Question 15

A cyclist travels 20 km north, then 15 km south. What is the magnitude of the cyclist's displacement?

Accepted Answer

$$5\ \mathrm{km}$$

Question 16

Which of the following best describes the meaning of the slope of a position vs. time graph?

Accepted Answer

It represents the object's velocity.

Question 17

A car accelerates from $$10\ \mathrm{m/s} to$$ $$30\ \mathrm{m/s} in$$ $$5\ \mathrm{s}. $$What is its average acceleration?

Accepted Answer

$$4\ \mathrm{m/s^2$}$$

Question 18

If a car moves at a constant velocity of $$20\ \mathrm{m/s}$$ for $$10\ \mathrm{s}$$, how far does it travel?

Accepted Answer

$$200\ \mathrm{m}$$

Question 19

Which of the following is a correct method for converting $$2.2$$ hours to seconds?

Accepted Answer

$$2.2 	imes 60 	imes 60$$

Question 20

A car starts from rest and accelerates at $$4.9\ \mathrm{m/s^2$}$$ until it reaches a speed of $$30\ \mathrm{m/s}. $$What distance does it cover during this acceleration?

Accepted Answer

$$91.8\ \mathrm{m}$$

Physics I: Week 1 – 1D Kinematics Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard