Relative Motion
Physics ⇒ Mechanics
Relative Motion starts at 9 and continues till grade 12.
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See sample questions for grade 9
Define 'frame of reference' in your own words.
Describe a real-life situation where understanding relative motion is important.
Explain why a person sitting in a moving train appears stationary to another passenger but moving to an observer outside the train.
Explain why the concept of relative motion is important in air travel.
A boat moves north at 10 m/s in a river flowing east at 5 m/s. What is the magnitude of the boat's velocity relative to the ground?
A car moves at 70 km/h east and another at 50 km/h west. What is the velocity of the first car relative to the second?
A person walks at 2 m/s east on a train moving at 8 m/s west. What is the person's velocity relative to the ground?
A person walks at 2 m/s north on a moving walkway going 3 m/s east. What is the magnitude of the person's velocity relative to the ground?
If two objects move in opposite directions, their relative velocity is the difference of their speeds. (1) True (2) False
If two objects move in the same direction at the same speed, their relative velocity is zero. (1) True (2) False
Relative motion can only be observed when there is more than one object. (1) True (2) False
Relative motion is a concept that applies only to objects moving in straight lines. (1) True (2) False
If two objects move towards each other, their relative speed is the ______ of their individual speeds.
Relative motion is always measured with respect to a ________.
The formula for relative velocity of object A with respect to object B is ________.
The reference point from which motion is observed is called the ________.
If two objects move in opposite directions, their relative velocity is the difference of their speeds. (1) True (2) False
If two objects move in the same direction at the same speed, their relative velocity is zero. (1) True (2) False
Relative motion can only be observed when there is more than one object. (1) True (2) False
Relative motion is a concept that applies only to objects moving in straight lines. (1) True (2) False
