Lesson 6: Motion

Question 1

What does it mean when we say motion is relative?
A. Motion depends on the size of the object
B. Motion depends on the frame of reference
C. Motion is always constant
D. Motion only exists when acceleration occurs

Answer 1

B. Motion depends on the frame of reference

Question 2

What is a frame of reference?
A. The speed at which an object is moving
B. An arbitrary coordinate system used to measure motion
C. A point where motion begins
D. The only correct way to measure velocity

Answer 2

B. An arbitrary coordinate system used to measure motion

Question 3

What are the two main types of motion?
A. Speed and acceleration
B. Uniform and non-uniform motion
C. Inertial motion and accelerated motion
D. Constant velocity and changing speed

Answer 3

C. Inertial motion and accelerated motion

Question 4

Which of the following best describes inertial motion?
A. Motion with changing velocity
B. Motion at a constant speed in a straight line
C. Motion in a circular path
D. Motion that starts and stops periodically

Answer 4

B. Motion at a constant speed in a straight line

Question 5

What is acceleration?
A. The distance an object travels per unit time
B. The change in position with respect to a frame of reference
C. The change of velocity per unit time
D. The total time an object remains in motion

Answer 5

C. The change of velocity per unit time

Question 6

Which of the following statements is TRUE about speed?
A. Speed is the same as velocity
B. Speed involves both distance and direction
C. Speed is the distance an object moves per unit of time
D. Speed is measured in meters per second squared (m/s²)

Answer 6

C. Speed is the distance an object moves per unit of time

Question 7

What is the SI unit of acceleration?
A. m/s
B. m/s²
C. kg
D. m

Answer 7

B. m/s²

Question 8

Usain Bolt can run at a speed of 10 m/s. Compared to the running speed of a cheetah, how fast is this?
A. Faster than a cheetah
B. About the same speed as a cheetah
C. Slower than a cheetah
D. Much faster than a cheetah

Answer 8

C. Slower than a cheetah

Question 9

The speed of light in a vacuum is 300,000,000 m/s. How many times could you circle Earth’s equator in 1 second if you could move at the speed of light?
A. Once
B. More than seven times
C. Ten times
D. Less than one time

Answer 9

B. More than seven times

Question 10

What can you conclude about motion in the universe?
A. Every object in the universe moves at the same speed
B. Every object in the universe is simultaneously moving at different speeds depending on the frame of reference
C. Motion only occurs when there is acceleration
D. Motion is constant and predictable for all objects

Answer 10

B. Every object in the universe is simultaneously moving at different speeds depending on the frame of reference

Question 11

What happens to the measurement of motion when viewed from different frames of reference (FORs)?
A. It stays the same across all frames
B. It changes depending on the frame of reference
C. It becomes inaccurate
D. It becomes constant regardless of the frame

Answer 11

B. It changes depending on the frame of reference

Question 12

Which of the following is TRUE about motion?
A. Motion only occurs when velocity changes
B. Motion is the change in position with respect to a frame of reference
C. Motion is independent of the observer’s frame of reference
D. Motion occurs only in a straight line

Answer 12

B. Motion is the change in position with respect to a frame of reference

Question 13

What is the key difference between inertial motion and accelerated motion?
A. Inertial motion involves a change in velocity, while accelerated motion does not
B. Accelerated motion involves no acceleration, while inertial motion involves constant velocity
C. Inertial motion has constant velocity, while accelerated motion involves changing velocity
D. Inertial motion involves acceleration, while accelerated motion occurs without acceleration

Answer 13

C. Inertial motion has constant velocity, while accelerated motion involves changing velocity

Question 14

Which of the following is a correct statement about speed?
A. Speed involves both distance and direction
B. Speed is the distance covered per unit of time
C. Speed is measured in m/s²
D. Speed measures the total time an object is in motion

Answer 14

B. Speed is the distance covered per unit of time

Question 15

Which of the following is the correct SI unit for velocity?
A. m/s
B. m²/s
C. m/s²
D. m/kg

Answer 15

A. m/s

Question 16

Why is 10 m/s considered slow when compared to the speed of a cheetah?
A. Because cheetahs can reach a maximum speed of 30 m/s
B. Because humans can run faster than 10 m/s
C. Because 10 m/s is faster than most land animals
D. Because the speed of light is much faster than 10 m/s

Answer 16

A. Because cheetahs can reach a maximum speed of 30 m/s

Question 17

Which of the following statements is TRUE about velocity?
A. Velocity only measures how far an object moves
B. Velocity is the same as speed but does not account for direction
C. Velocity measures both speed and direction of motion
D. Velocity does not change with acceleration

Answer 17

C. Velocity measures both speed and direction of motion

Question 18

In which scenario would you experience accelerated motion?
A. When traveling at a constant speed in a straight line
B. When moving in a circle at constant speed
C. When moving with changing velocity
D. When motion occurs without any change in velocity

Answer 18

C. When moving with changing velocity

Question 19

What is the nearest star to Earth?
A. Proxima Centauri
B. Alpha Centauri
C. Sun
D. Icarus

Answer 19

C. Sun

Question 20

How far is the Sun from Earth?
A. 8 light-minutes away
B. 4 light-years away
C. 1 light-year away
D. 9 billion light-years away

Answer 20

A. 8 light-minutes away

Question 21

Which star is the second nearest to Earth after the Sun?
A. Alpha Centauri
B. Betelgeuse
C. Proxima Centauri
D. Icarus

Answer 21

C. Proxima Centauri

Question 22

How far is Proxima Centauri from Earth?
A. 8 light-minutes
B. 4 light-years
C. 9 billion light-years
D. 1 light-year

Answer 22

B. 4 light-years

Question 23

What is Icarus in the context of stars?
A. The nearest star to Earth
B. A star in the Solar System
C. The farthest individual star ever seen by the Hubble Telescope
D. The brightest star in the sky

Answer 23

C. The farthest individual star ever seen by the Hubble Telescope

Question 24

How far is Icarus from Earth?
A. 4 light-years
B. 8 light-minutes
C. 9 billion light-years
D. 1 million light-years

Answer 24

C. 9 billion light-years

Question 25

What does the term stellar ghost refer to?
A. Stars that move faster than the speed of light
B. Stars that have already exploded but are still visible to us
C. Stars that will never be visible in the night sky
D. Stars that do not emit any light

Answer 25

B. Stars that have already exploded but are still visible to us

Question 26

Why are stellar ghosts still visible even though they no longer exist?
A. Because they emit infinite light
B. Because they are too far for their light to reach Earth quickly
C. Because they reflect light from other stars
D. Because their brightness never fades

Answer 26

B. Because they are too far for their light to reach Earth quickly

Question 27

Which of the following is a correct description of a light-year?
A. The distance light travels in a minute
B. The time it takes for light to reach Earth from the Sun
C. The distance light travels in one year
D. The time it takes for light to travel between stars

Answer 27

C. The distance light travels in one year

Question 28

What is the significance of Icarus, the star seen by the Hubble Telescope?
A. It is the closest star to the Milky Way
B. It is the farthest individual star ever observed
C. It is a stellar ghost that will soon disappear
D. It is part of a nearby star cluster

Answer 28

B. It is the farthest individual star ever observed