Question 1

A car moves along a straight road at a constant velocity. Which of the following statements is TRUE about its position-versus-time graph?

Accepted Answer

The graph is a straight line with a slope equal to the car's velocity.

Question 2

A runner travels 100 m east, then 40 m west along a straight track. What is the runner's total distance traveled and displacement?

Accepted Answer

Distance: 140 m, Displacement: 60 m east

Question 3

Which equation correctly relates the final position $$x_f of an $$object moving with constant velocity $$v$$ over a time interval $$\Delta t$$ from initial position $$x_i$$?

Accepted Answer

$$x_f = x_i + v \Delta t$$

Question 4

A cyclist's position-versus-time graph has a negative slope. What does this indicate about the cyclist's motion?

Accepted Answer

The cyclist is moving in the negative direction at constant speed.

Question 5

The instantaneous velocity of an object at time $$t is $$given by which mathematical operation on the position function $$x(t)$$?

Accepted Answer

The derivative of $$x(t)$$ with respect to $$t$$

Question 6

A drag racer starts from rest and accelerates uniformly, reaching a velocity of 12 m/s in 3.0 s. What is the displacement during this time?

Accepted Answer

$$18\ \mathrm{m}$$

Question 7

Which of the following is TRUE about the area under a velocity-versus-time graph between $$t_1$$ and $$t_2$$?

Accepted Answer

It represents the object's displacement $$\Delta x.$$

Question 8

A ball is tossed straight up. At its highest point, what is the ball's instantaneous acceleration?

Accepted Answer

Negative

Question 9

A car starts from rest and accelerates at $$a = 4\ \mathrm{m/s^2$}$$ for $$5\ \mathrm{s}. $$What is its final velocity?

Accepted Answer

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

Question 10

A Volkswagen Beetle moves at a steady $$20\ \mathrm{m/s}$$ and passes a Porsche at rest. The Porsche accelerates at $$5.0\ \mathrm{m/s^2$}. $$How far does the Porsche travel before overtaking the Beetle?

Accepted Answer

$$160\ \mathrm{m}$$

Question 11

An object slides down a frictionless inclined plane at angle $$	heta. $$What is the acceleration along the incline?

Accepted Answer

$$a = g \sin 	heta$$

Question 12

A springbok accelerates upward at $$35\ \mathrm{m/s^2$}$$ for $$0.70\ \mathrm{m}$$ before leaving the ground. What is its velocity as it leaves the ground?

Accepted Answer

$$v = 7.0\ \mathrm{m/s}$$

Question 13

Which kinematic equation is appropriate for finding the displacement $$\Delta x of an $$object with constant acceleration $$a$$ and initial velocity $$v_0$$ over time $$t$$?

Accepted Answer

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

Question 14

A position-versus-time graph for an object shows a curve with increasing positive slope. What does this indicate about the object's motion?

Accepted Answer

The object is accelerating in the positive direction.

Question 15

A car moves with a velocity given by $$v(t) = 4t (in m/s). $$What is the car's displacement between $$t = 0$$ and $$t = 3 s$$?

Accepted Answer

$$18\ \mathrm{m}$$

Question 16

Which of the following statements about acceleration is correct?

Accepted Answer

Acceleration is the rate of change of velocity.

Question 17

A ball rolls up a ramp and then down. What is the sign of its acceleration while rolling down the ramp?

Accepted Answer

Negative

Question 18

An elevator's position-versus-time graph has a section where the slope is zero. What does this indicate about the elevator's motion?

Accepted Answer

The elevator is at rest.

Question 19

A car slows down while moving away from the origin. What is the sign of its velocity and acceleration?

Accepted Answer

Velocity is positive, acceleration is negative.

Question 20

Which of the following is a scalar quantity?

Accepted Answer

Distance

Kinematics in One Dimension: Study Notes

Guida di studio - Domande di pratica

Study guide - Flashcard