Question 1

Which of the following best describes the difference between total distance and total displacement for an object moving back and forth along a straight line?

Accepted Answer

Total distance is the length of the path traveled, while total displacement is the net change in position.

Question 2

An ant crawls from $$x=40\ \mathrm{cm} to$$ $$x=10\ \mathrm{cm}$$ and then returns to $$x=40\ \mathrm{cm} in 20 $$seconds. What is its average velocity?

Accepted Answer

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

Question 3

Which equation correctly expresses the average velocity $$v_{avg}$$ over a time interval $$\Delta t$$?

Accepted Answer

$$v_{avg} = \frac{\Delta x}{\Delta t}$$

Question 4

For an object moving with constant velocity, which of the following statements is true?

Accepted Answer

The position vs. time graph is a straight line with constant slope.

Question 5

What does the slope of a position vs. time graph represent?

Accepted Answer

The instantaneous velocity.

Question 6

If the velocity of an object is given by $$v = \frac{dx}{dt}$$, what does the area under the velocity vs. time graph represent?

Accepted Answer

The total displacement $$\Delta x$$

Question 7

A rock is dropped from a 20-m tall building. What is its impact velocity? (Assume $$g = 9.8\ \mathrm{m/s^2$}$$ and downward is negative.)

Accepted Answer

$$-20\ \mathrm{m/s}$$

Question 8

Which of the following is a correct kinematic equation for constant acceleration?

Accepted Answer

$$v_f = v_i + a \Delta t$$

Question 9

A ball rolls up a ramp and then back down. If the positive direction is up the ramp, what is the sign of the acceleration while the ball is rolling up?

Accepted Answer

Negative

Question 10

On a frictionless inclined plane at angle $$	heta$$, what is the acceleration of an object sliding down the ramp?

Accepted Answer

$$a = g \sin 	heta$$

Question 11

Which of the following is true about objects in free fall near Earth's surface?

Accepted Answer

All objects experience the same acceleration regardless of their mass.

Question 12

Which of the following is the correct expression for displacement under constant acceleration?

Accepted Answer

$$\Delta s = v_i \Delta t + \frac{1}{2} a \Delta t^2$

Question 13

What is the instantaneous velocity at the maximum of a smooth $$x vs$$. $$t$$ curve?

Accepted Answer

Zero

Question 14

Which of the following is NOT a classical simple machine?

Accepted Answer

Spring

Question 15

If the velocity vs. time graph of an object is a straight line with a positive slope, what does this indicate about the object's motion?

Accepted Answer

The object is accelerating at a constant rate.

Question 16

Which mathematical process is used to find the area under a curve in physics?

Accepted Answer

Integration

Question 17

A basketball player moves with a velocity that increases linearly for 6 seconds, then decreases linearly for the next 6 seconds. What is the acceleration during the first 6 seconds if the velocity changes from 0 to 6 m/s?

Accepted Answer

$$1.0\ \mathrm{m/s^2$}$$

Question 18

Which of the following is the correct kinematic equation relating final velocity, initial velocity, acceleration, and displacement?

Accepted Answer

$$v_f^2$ = v_i^2$ + 2a \Delta s$$

Question 19

Which statement about the idealization of a train as a point particle in 1D kinematics is correct?

Accepted Answer

It is valid when the motion is entirely along a straight line and other dimensions can be neglected.

Kinematics in One Dimension: Structured Study Notes

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드