Motion in a Str...

Average speed is defined as the total path length travelled divided by the total time interval during which

A car moving at a speed v is stopped after a certain distance when the brakes produce a deceleration a. If the speed of the car is nv, what must be the deceleration of the car to stop it in the same distance and in the same time?

An automobile travelling with a speed of 60 km/hr can stop within a distance of 20 m. If a car travels twice as fast, i.e. 120 km/hr, then the automobile will stop within a distance of

A metro train starts from rest and in 5 s, attains a speed of 108 km/hr. After that, it moves with a constant velocity and comes to rest after travelling 45 metres with uniform retardation. If the total distance travelled is 395 metres, find the total time of travelling.

Displacement is a

A bullet is fired into a fixed wooden block and it loses half of its velocity after penetrating 40 cm. It comes to rest after penetrating a further distance of

For motion in 3 dimensions we need

If a ball is thrown horizontally with a velocity of 8 m/s from the top of a building, the ball falls on the ground 12 m away from the building. What is the height of the building?

A student is standing at a distance of 50 metres from a bus. As soon as the bus begins its motion with an acceleration of 1 ms^-2, the student starts running towards the bus with a uniform velocity 'u'. Assuming the motion to be along a straight road, calculate the minimum value of 'u' so that the student is able to catch the bus.