Question 1

Which of the following best describes Zeno's Dichotomy Paradox?

Accepted Answer

It claims that before reaching a destination, one must first complete an infinite number of smaller tasks, making motion seem impossible.

Question 2

In a motion diagram, if the distance between successive positions of a car increases with each frame (with equal time intervals), what can you conclude about the car's motion?

Accepted Answer

The car's speed is increasing.

Question 3

Which of the following is a vector quantity?

Accepted Answer

Velocity

Question 4

A car moves from $$x_0 = 2$$\ \mathrm{m}$$ to x_1$ = 10\ \mathrm{m} in$$ $$4\ \mathrm{s}. $$What is its average velocity?

Accepted Answer

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

Question 5

If a ball is tossed straight up, what is the direction of its acceleration at the very highest point?

Accepted Answer

Downward

Question 6

Which of the following statements about acceleration is correct?

Accepted Answer

Acceleration is the rate of change of velocity and is a vector.

Question 7

A car is moving to the left (negative direction) and speeding up. What can you say about the signs of its velocity and acceleration?

Accepted Answer

Both velocity and acceleration are negative.

Question 8

Which SI unit is currently defined by the distance light travels in a vacuum during $$1/299,792,458 of a $$second?

Accepted Answer

Meter

Question 9

If the acceleration vector is perpendicular to the velocity vector, what happens to the object's motion?

Accepted Answer

The speed remains constant, but the direction of velocity changes.

Question 10

Convert $$2.00$$ feet to meters using the conversion $$1\ \mathrm{in} = 2.54\ \mathrm{cm}$$ and $$1\ \mathrm{ft} = 12\ \mathrm{in}.$$

Accepted Answer

$$0.610\ \mathrm{m}$$

Question 11

Which of the following has the greatest number of significant figures?

Accepted Answer

6.200

Question 12

A car's velocity changes 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 13

Which of the following is NOT a base SI unit you need to know for this course?

Accepted Answer

Candela

Question 14

If a car is slowing down while moving to the right (positive direction), what is the sign of its acceleration?

Accepted Answer

Negative

Question 15

Which of the following best describes the difference between speed and velocity?

Accepted Answer

Speed is a scalar, velocity is a vector.

Question 16

A skier moves from position $$(x_1$, y_1$) = (10, 15) to$$ $$(x_2$, y_2$) = (20, 25)$$ meters. What is the magnitude of the displacement vector?

Accepted Answer

$$\sqrt{(20-10)^2$ + (25-15)^2$} = 14.1\ \mathrm{m}$$

Question 17

Which of the following is an order-of-magnitude estimate?

Accepted Answer

The mass of a large human is about $$100\ \mathrm{kg}.$$

Question 18

Which prefix represents $$10^{-6} in $$the SI system?

Accepted Answer

micro

Question 19

If you add $$6.47\ \mathrm{kg}$$ and $$1.2\ \mathrm{kg}$$, how many significant figures should your answer have?

Accepted Answer

2

Question 20

Which of the following statements about reference points and displacement is correct?

Accepted Answer

Different observers may disagree on position, but must agree on displacement if they use the same axis.

Concepts of Motion – Physics 1051 Chapter 1 Study Notes

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드