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 11
Define relative velocity.
Describe how the concept of relative motion applies to a person walking inside a moving train.
Describe the difference between absolute and relative velocity.
Explain why passengers in a moving bus feel as if they are thrown forward when the bus suddenly stops.
A bird flies at 8 m/s north relative to the air. If the wind blows at 6 m/s east, what is the bird's speed relative to the ground?
A boat can travel at 10 m/s in still water. If the river flows at 3 m/s, what is the velocity of the boat relative to the ground when it moves downstream?
A car moves at 20 m/s north and a bike moves at 15 m/s south. What is the velocity of the car relative to the bike? (1) 5 m/s north, (2) 35 m/s north, (3) 5 m/s south, (4) 35 m/s south
A man rows a boat at 5 km/h in still water. If the river flows at 3 km/h, what is the minimum time required to cross a river 600 m wide, assuming he rows perpendicular to the current?
A car moves at 20 m/s north and a bike moves at 15 m/s south. What is the velocity of the car relative to the bike? (1) 5 m/s north, (2) 35 m/s north, (3) 5 m/s south, (4) 35 m/s south
A person walks at 2 m/s north on a ship moving at 8 m/s east. What is the magnitude of the person's velocity relative to the ground? (1) 6 m/s, (2) 8 m/s, (3) 10 m/s, (4) 2 m/s
A train moves at 60 km/h. A passenger walks at 5 km/h in the direction opposite to the train's motion. What is the passenger's velocity relative to the ground? (1) 55 km/h, (2) 65 km/h, (3) 60 km/h, (4) 5 km/h
The concept of relative motion is based on which principle? (1) Inertia, (2) Relativity, (3) Conservation of energy, (4) Conservation of momentum
Relative motion is always measured with respect to a chosen ______.
The magnitude of the relative velocity between two objects moving in opposite directions is the ______ of their speeds.
The reference frame in which an observer is at rest is called the ______ frame.
The sum of the velocities of two objects moving in opposite directions gives their ______ velocity.
If two objects move in the same direction with equal speeds, their relative velocity is zero. True or False?
Relative motion is not affected by the choice of reference frame. True or False?
Relative motion is only meaningful when there is more than one object involved. True or False?
Relative velocity can be negative. True or False?
