NDA PHYSICS QUIZ - 23

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Question 1:

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 2:

When we try to move an object at rest which type of friction comes into play?

Question 3:

It is difficult to walk on an oily floor because

Question 4:

Friction always- 

Question 5:

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 6:

The roof and walls of the auditorium are generally covered with sound-absorbent materials to reduce the effect of –

Question 7:

Friction is a- 

Question 8:

Fat can be separated from milk in a cream separator because of - 

Question 9:

Friction due to fluids is known as - 

Question 10:

Friction can be reduced by using-