Relative Motion

Physics ⇒ Mechanics

Relative Motion starts at 9 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Relative Motion. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.

See sample questions for grade 10

Describe how the concept of relative motion applies to a person running on a moving escalator.

Describe how the velocity of rain appears to a person running in the rain compared to a person standing still.

Describe what is meant by a 'frame of reference' in the context of relative motion.

Explain why a person walking inside a moving bus appears to move faster or slower to an observer outside the bus.

A bird flies at 10 m/s north relative to the air. If the wind blows at 5 m/s east, what is the bird's velocity relative to the ground?

A boat moves at 10 m/s in still water. If the river flows at 3 m/s downstream, what is the velocity of the boat relative to the riverbank when moving downstream?

A boat moves at 8 m/s across a river flowing at 6 m/s. What is the resultant velocity of the boat relative to the ground?

A car moves at 70 km/h west and another at 50 km/h east. What is the velocity of the first car relative to the second?

If two objects move towards each other, their relative speed is: (1) The sum of their speeds, (2) The difference of their speeds, (3) The product of their speeds, (4) Zero

Relative motion is always measured with respect to: (1) The ground, (2) Another object, (3) The sun, (4) The observer's frame of reference

The velocity of object A relative to object B is called: (1) Absolute velocity, (2) Relative velocity, (3) Average velocity, (4) Instantaneous velocity

Which of the following best describes relative velocity? (1) The velocity of an object with respect to a fixed point, (2) The velocity of an object with respect to another moving object, (3) The average velocity over time, (4) The instantaneous velocity at a point

Fill in the blank: In relative motion, the observer is considered to be at ______.

Fill in the blank: The concept of relative motion is essential for understanding ______, such as cars on a highway or boats in a river.

Fill in the blank: The relative velocity of object A with respect to object B is given by the formula v_AB = v_A - v_B.

Fill in the blank: The relative velocity of two objects moving in the same direction is the ______ of their velocities.

True or False: Relative velocity can be negative depending on the direction of motion.

True or False: The concept of relative motion is not applicable in a stationary frame of reference.

True or False: The direction of relative velocity is always the same as the direction of the faster object.

True or False: The laws of physics are the same in all inertial frames of reference.