Quiz 1 General Physics (Relative Motion)

Which of the following scenarios involves relative motion?

• A person sitting in a stationary car

• A bird flying past a moving car

• A tree swaying in the wind

• A rock lying on the ground

Two trains are moving on parallel tracks in opposite directions. From the perspective of a passenger on one train, the other train appears to be moving:

• Faster than it actually is

• Slower than it actually is

• At the same speed

• Not moving at all

Which of the following statements is true about inertial frames of reference?

• They are always at rest

• They can be accelerating

• They move at constant velocity relative to each other

• They are only found in outer space

Which of the following is an example of an inertial frame of reference?

• A car accelerating on a highway

• A train moving at a constant speed on a straight track

• A rotating merry-go-round

• A plane taking off from a runway

If two observers are moving relative to each other at a constant velocity, which of the following quantities will they agree on?

• Time intervals

• Lengths measured along the direction of motion

• The speed of light

• The mass of objects

An observer in an inertial frame of reference measures the speed of a moving car. Which of the following will affect their measurement?

• The car’s color

• The observer’s speed relative to the car

• The time of day

• The car’s make and model

Which of the following best describes the concept of relative motion?

• Motion that is absolute and independent of the observer

• Motion that depends on the observer’s frame of reference

• Motion that occurs only in a vacuum

• Motion that is unaffected by external forces

In which scenario is the concept of relative motion most applicable?

• A person standing still on the ground

• A satellite orbiting the Earth

• A car parked in a garage

• A book resting on a table

Which of the following is NOT a characteristic of an inertial frame of reference?

• It is either at rest or moving at a constant velocity

• Newton’s laws of motion are valid

• It can be accelerating

• It does not experience any net force

In an inertial frame of reference, an object at rest will:

• Start moving spontaneously

• Remain at rest unless acted upon by a force

• Accelerate without any force applied

• Move in a circular path