Two persons  A, B are in the lift. To B, A appears in rest. Then, B must be ____

 

If the velocity of the aeroplane is 20 m /s, the distance from the initial to the final point is 2300 m. Find the time taken by the aircraft to reach the destination.

 

1 hr 55 mins equals 115 minutes

The unit of time in CGS system and SI system  is

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If a car is moving to 400 m/s North , and 300 m/s East. What is the relative velocity?

 

If the river's width is 10 m  and the angle of the drift is 60 degrees, the velocity of the person on the boat concerning the river is 4 m/s. Find the time taken by to cross the river.

 

If the river's width is 4 m and the angle of the drift is 30 degrees, the velocity of the person on the boat concerning the river is 3 m/s. Find the time taken to cross the river.

 

Let us consider two cars, A and B, are moving with constant acceleration 4 m/s² and constant velocity 6 m/s with t = 0 s, both cars are 20 m apart, car A is behind car B, find the time when car A overtakes car B.

Let us consider two cars, A and B, are moving with a constant acceleration of 2 m/ s² and a constant velocity of 3 m/s with t=0 s. Bo the cars are 12 m apart, car A is behind car B. Find the time when car A overtakes car B.

 

If a body moved to a displacement of 4 m in 2 s. Find  the velocity of the body.

An observer is watching a car moving with constant velocity. He assumes the person is at rest.

If a dog swims across the river with 3 m/s and the river's speed is 4 m/s. Find the velocity of the dog.

If a boat moves on the river with the speed of 50 km/h and also moves in other directions relatively with a speed of 30 km/h. What is the speed of the boat?

Relative motion can be used to evaluate ________.