Question 1

A car moves along a straight road and its position-versus-time graph is a straight line with a positive slope. What does this indicate about the car's motion?

Accepted Answer

The car is moving at a constant velocity to the right.

Question 2

A student walks to school and her position-versus-time graph shows a curve that gets steeper as time increases. What does this tell you about her velocity?

Accepted Answer

Her velocity is increasing.

Question 3

Given the equation for uniform motion $$x_f = x_i + v \Delta t$$, what is the displacement $$\Delta x if a $$train moves at $$20\ \mathrm{m/s}$$ for $$5\ \mathrm{min}$$?

Accepted Answer

$$\Delta x = 6000\ \mathrm{m}$$

Question 4

A car's velocity-versus-time graph is a horizontal line at $$v_x = 12\ \mathrm{m/s}. $$What is the area under the graph between $$t = 0$$ and $$t = 3\ \mathrm{s}$$, and what does it represent?

Accepted Answer

The area is $$36\ \mathrm{m}$$ and it represents the displacement.

Question 5

A velocity-versus-time graph for a car shows a straight line decreasing from $$15\ \mathrm{m/s} to$$ $$0\ \mathrm{m/s} in$$ $$1.5\ \mathrm{s}. $$What is the car's acceleration?

Accepted Answer

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

Question 6

A drag racer starts from rest and travels $$6.0\ \mathrm{m} in$$ $$1.0\ \mathrm{s}. If $$the acceleration remains constant, how far will the car travel in $$5.0\ \mathrm{s}$$?

Accepted Answer

$$150\ \mathrm{m}$$

Question 7

A lion accelerates from rest at $$a = 9.5\ \mathrm{m/s^2$} to a $$speed of $$4.5\ \mathrm{m/s}. $$How much time does it take?

Accepted Answer

$$t = 0.47\ \mathrm{s}$$

Question 8

A rock is dropped from rest from a cliff $$100\ \mathrm{m}$$ high. How long does it take to reach the ground? (Use $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$t = 4.52\ \mathrm{s}$$

Question 9

A Boeing 747 accelerates at $$2.6\ \mathrm{m/s^2$}$$ from rest to a takeoff speed of $$70\ \mathrm{m/s}. $$What is the minimum length of runway required?

Accepted Answer

$$x = 940\ \mathrm{m}$$

Question 10

A springbok jumps straight up with a takeoff speed of $$7.0\ \mathrm{m/s}. $$What is the maximum height it reaches? (Use $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$h = 2.5\ \mathrm{m}$$

Question 11

Which of the following statements about free fall is correct?

Accepted Answer

All objects in free fall near Earth's surface have the same acceleration, regardless of mass.

Question 12

If the velocity of an object is zero at some instant, what can you conclude about its acceleration at that instant?

Accepted Answer

Nothing can be concluded; acceleration could be zero, positive, or negative.

Question 13

A car moves to the left with increasing speed. Which motion diagram best represents this motion?

Accepted Answer

B. Arrows to the left, increasing in length.

Question 14

The slope at a point on a position-versus-time graph of an object is:

Accepted Answer

The object's velocity at that point.

Question 15

A velocity-versus-time graph is a straight line with a positive slope. What does this indicate about the object's acceleration?

Accepted Answer

The object has a constant positive acceleration.

Question 16

A car starts from rest and accelerates uniformly at $$3\ \mathrm{m/s^2$}$$ for $$4\ \mathrm{s}. $$What is its final velocity?

Accepted Answer

$$v = 12\ \mathrm{m/s}$$

Question 17

A ball is thrown straight up with an initial velocity of $$20\ \mathrm{m/s}. $$How long does it take to reach its highest point? (Use $$g = 9.8\ \mathrm{m/s^2$})$$

Accepted Answer

$$t = 2.04\ \mathrm{s}$$

Chapter 2: Motion in One Dimension – Structured Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards