Question 1

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

Accepted Answer

Distance is the total path length traveled, while displacement is the straight-line change in position from the starting point to the ending point.

Question 2

A jogger runs 400 m north, then 400 m west, then 400 m south, and finally 400 m east, returning to the starting point. What is the jogger's total displacement?

Accepted Answer

$$0\ \mathrm{m}$$

Question 3

A car accelerates from rest to $$24\ \mathrm{m/s} in$$ $$12\ \mathrm{s}. $$What is its acceleration?

Accepted Answer

$$0.5\ \mathrm{m/s^2$}$$

Question 4

Which of the following quantities is NOT a vector?

Accepted Answer

Distance

Question 5

A cyclist travels at an average velocity of $$8.5\ \mathrm{m/s}$$ for $$4\ \mathrm{hours}. $$How far does the cyclist travel?

Accepted Answer

$$122,400\ \mathrm{m}$$

Question 6

The speedometer in a car measures:

Accepted Answer

Instantaneous speed relative to the surface the car is rolling on

Question 7

If a pebble is dropped from a bridge $$62\ \mathrm{m}$$ above water and hits the water $$3.5\ \mathrm{s}$$ later, what is its average velocity?

Accepted Answer

$$17.7\ \mathrm{m/s}$$

Question 8

Which of the following best describes deceleration?

Accepted Answer

Acceleration opposite in direction to the velocity.

Question 9

A train traveling $$35\ \mathrm{m/s}$$ [North] slows to $$15\ \mathrm{m/s}$$ [North] in $$48\ \mathrm{s}. $$What is its acceleration?

Accepted Answer

$$-0.42\ \mathrm{m/s^2$}$$ [North]

Question 10

Which equation would you use to find the displacement $$\Delta x of an $$object under constant acceleration, given initial velocity $$v_0$$, time $$t$$, and acceleration $$a$$?

Accepted Answer

$$\Delta x = v_0$ t + \frac{1}{2} a t^2$

Question 11

A ball is thrown straight up with an initial velocity of $$5.0\ \mathrm{m/s}$$ and is caught at the same height. How long is the ball in the air? (Assume $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$1.02\ \mathrm{s}$$

Question 12

A model rocket is launched vertically with an initial speed of $$35\ \mathrm{m/s}. $$How long does it take to reach its maximum height? (Assume $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$3.57\ \mathrm{s}$$

Question 13

Which of the following is true about reference frames?

Accepted Answer

Reference frames are arbitrary and should be chosen to simplify the problem.

Question 14

A car travels $$180\ \mathrm{km} at$$ $$90\ \mathrm{km/h}$$, then slows to $$60\ \mathrm{km/h}$$ for the remainder of a $$4.5\ \mathrm{hour}$$ trip. How far away was the starting point?

Accepted Answer

$$270\ \mathrm{km}$$

Question 15

Which of the following best describes instantaneous velocity?

Accepted Answer

The velocity at a specific instant, found as the slope of the tangent to a position vs. time graph.

Question 16

A child drops a rock down a well and hears it hit the water $$1.0\ \mathrm{s}$$ later. Neglecting the time for sound to travel back up, how far down is the water? (Assume $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$4.9\ \mathrm{m}$$

Question 17

Which of the following is the correct formula for average acceleration?

Accepted Answer

$$\overline{a} = \frac{\Delta v}{\Delta t}$$

Question 18

A car is moving at $$15\ \mathrm{m/s}$$ and slows down to $$5\ \mathrm{m/s} in$$ $$5\ \mathrm{s}. $$What is its acceleration?

Accepted Answer

$$-2.0\ \mathrm{m/s^2$}$$

Question 19

Which of the following equations is NOT one of the four kinematic equations for constant acceleration?

Accepted Answer

$$a = \frac{v_0$}{t} + \Delta x$$

Kinematics in One Dimension: Describing Motion

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