An automobile travelling with a speed of 60 km/h, can brake to stop within a distance of 20 m. If the car is going twice as fast, ie. 120 km/h, the stopping distance will be
The displacement-time graph for the two particles A and B are straight lines inclined at angles 30ºand 60º with the time axis. The ratio of the velocities of A to B will be
A ball is dropped from a high rise platform at t = 0 starting from rest. After 6 seconds another ball is thrown downwards from the same platform with a speed v. The two ball meet at t = 18s. What is the value of v ? [take g = 10 ms¯²]
A body is moving with velocity 30 m/s towards east. After 10 seconds its velocity becomes 40 m/s towards north. The average acceleration of the body is :
The motion of a particle along a straight line is described by equation :
x = 8 + 12 t – t³ where x is in metre and t in second. The retardation of the particle when its velocity becomes zero, is :
