A block of mass 10 kg is placed on a rough horizontal surface whose coefficient of friction is 0.5.If a horizontal force of 100 N is applied on it,then acceleration of block will be :
Two blocks P and Q are released at the top of a rough inclined plane so that P slides along the plane and Q falls down freely. Which will have higher velocity on reaching the ground?
Both will reach the ground with same velocity
It depends on the coefficient of friction
An air craft executes a horizontal loop at a speed of 720 km/h with its wings banked at 15° .What is the radius of the loop?
13 x 103 m
15.2 x 103 m
13.6 x 103 m
None of these
A block of 10 kg is pulled at a constant speed on a rough horizontal surface by a force of 20 N.Find the co- effecient of kinetic friction .Given that g = 10 m/s2 .
A smooth inclined plane has length 10 m and the angle of inclination is 300. A body of mass 2 kg is released from rest at the top of the inclined plane. What is its acceleration down the inclined plane?
A block of mass 50 kg is placed on a rough inclined plane.The inclination is gradually increased to 30° when the block starts sliding down.Find the magnitude of the limiting friction.
A body is placed on an inclined plane and has to be pushed down.The angle made by the normal reaction with the vertical will be
equal to the angle of repose
equal to the angle of friction
less than the angle of repose
more than the angle of friction
A light string passing over a smooth light pulley , connects two blocks of masses m1 and m2 (vertically).If the acceleration of the system is (g/8),then the ratio of masses is
8 : 1
9 : 7
4 : 3
5 : 3
Two forces of 6N and 8N act on a body of mass 7kg. The maximum value of acceleration produced cannot be more than
Two balls of mass 1 kg and 2 kg respectively are connected to the two ends of the spring. The two balls are pressed together and placed on a smooth table. When released the lighter ball moves with acceleration of 2 ms-2. The acceleration of the heavier ball will be