NDA PHYSICS QUIZ - 3

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Question 1:

The slope of a velocity-time graph gives the magnitude of-

Question 2:

Two trains A and B of length 400 m each are moving on two parallel tracks with a uniform speed of 72 km/h in the same direction, with A ahead of B. The driver of B decides to overtake A and accelerates by 1 m/s2. If after 50 s, the guard of B just brushes past the driver of A, what was the original distance between them?

Question 3:

A boy of mass 40 kg running at 4 m/s jumps on to a 20 kg trolley travelling in the same direction at 1 m/s. What is their common velocity ?

Question 4:

A car moving along a straight highway with speed of 126 km/h is brought to a stop within a distance of 200 m, how long does it take for the car to stop?

Question 5:

What is the change in momentum of a car of mass 1200 kg when its speed increases from 36 km/h to 72 km/h uniformly ?

Question 6:

A car of mass 500 kg is moving with a velocity of 10 m/s. A force is applied to it so that in 25 seconds, it attains a velocity of 35 m/s. Calculate the value of the force applied. 

Question 7:

If an object is covering equal distance in equal intervals of time it is said to be in-

Question 8:

Find the initial velocity of a car which takes 10 seconds to stop after applying brakes. The retardation due to brakes is 2.5 m/s2.

Question 9:

An athlete completes one round of a circular track of diameter 100 m in 20 s. What will be the displacements of athelete after 1 minute and 10 s , respectively?

Question 10:

A car of mass 500 kg moving at 2 m/s collides with a truck of mass 1200 kg moving in the same direction at 2 m/s. What is their common velocity just after the collision if they move off together?