Lesson 6: Motion Flashcards
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
B. Motion depends on the frame of reference
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
B. An arbitrary coordinate system used to measure motion
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
C. Inertial motion and accelerated motion
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
B. Motion at a constant speed in a straight line
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
C. The change of velocity per unit time
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)
C. Speed is the distance an object moves per unit of time
What is the SI unit of acceleration?
A. m/s
B. m/s²
C. kg
D. m
B. m/s²
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
C. Slower than a cheetah
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
B. More than seven times
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
B. Every object in the universe is simultaneously moving at different speeds depending on the frame of reference
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
B. It changes depending on the frame of reference
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
B. Motion is the change in position with respect to a frame of reference
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
C. Inertial motion has constant velocity, while accelerated motion involves changing velocity
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
B. Speed is the distance covered per unit of time
Which of the following is the correct SI unit for velocity?
A. m/s
B. m²/s
C. m/s²
D. m/kg
A. m/s
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
A. Because cheetahs can reach a maximum speed of 30 m/s
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
C. Velocity measures both speed and direction of motion
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
C. When moving with changing velocity
What is the nearest star to Earth?
A. Proxima Centauri
B. Alpha Centauri
C. Sun
D. Icarus
C. Sun
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
A. 8 light-minutes away
Which star is the second nearest to Earth after the Sun?
A. Alpha Centauri
B. Betelgeuse
C. Proxima Centauri
D. Icarus
C. Proxima Centauri
How far is Proxima Centauri from Earth?
A. 8 light-minutes
B. 4 light-years
C. 9 billion light-years
D. 1 light-year
B. 4 light-years
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
C. The farthest individual star ever seen by the Hubble Telescope
How far is Icarus from Earth?
A. 4 light-years
B. 8 light-minutes
C. 9 billion light-years
D. 1 million light-years
C. 9 billion light-years
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
B. Stars that have already exploded but are still visible to us
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
B. Because they are too far for their light to reach Earth quickly
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
C. The distance light travels in one year
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
B. It is the farthest individual star ever observed
