Motion in a Str...

The displacement-time graph for two particles A and B are straight lines inclined at angles of 30^o and 60^o with the time axis. The ratio of velocities of V_A : V_B is

A bullet emerges from a barrel of length 1.2 m with a speed of 640 ms^–1. Assuming constant acceleration, the approximate time that it spends in the barrel after the gun is fired is

A boy walks to his school at a distance of 6 km with constant speed of 2.5 km/hour and walks back with a constant speed of 4 km/hr. His average speed for round trip expressed in km/hour, is

A particle moves along a semicircle of radius 10 m in 5 sec. The average velocity of the particle is

The ratio of the numerical values of the average velocity and average speed of a body is always

A person travels along a straight road for the first half time with a velocity v₁ and the next time with a velocity v₂. The mean velocity V of the man is

Which of the following options is correct for the object having a straight line motion represented by the following graph?

The numerical ratio of displacement to the distance covered is always

A particle moves for 20 sec with velocity 3 m/s and then velocity 4 m/s for another 20 sec and finally moves with velocity 5 m/s for next 20 sec. What is the average velocity of the particle?

The correct statement from the following is