A horse pulls the cart. Which of the following forces makes the cart move?
force exerted by the horse on the cart
force exerted by the ground on the cart
force exerted by the ground on the horse
force exerted by the horse on the ground
A 600 kg rocket is set for a vertical firing.If the exhaust speed is 1000 m/s,the mass of the gas ejected per second to supply the thrust needed to overcome the weight of rocket is
117.6 kgs-1
58.6 kgs-1
6 kgs-1
76.4 kgs-1
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?
P
Q
Both will reach the ground with same velocity
It depends on the coefficient of friction
A block is lying static on the floor.The maximum value of static frictional force on the block is 10 N.If a horizontal force of 8 N is applied to the block,what will be the frictional force on the block ?
2 N
18 N
8 N
10 N
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 car of mass m is moving with momentum p.If μ be the coefficient of friction between the tyres and the road, what will be stopping distance due to friction alone ?
p2 / 2μg
p2 / 2mμg
p2 / 2m2μg
p2 / 2mg
A person swimming in a fresh water pool obeys
Newton's second law
Gravitational law
Newton's third law
Newton's first law
Which of the following is not an example of perfectly inelastic collision ?
A bullet fired into a block if bullet gets embedded into block
Capture of electrons by an atom
A man jumping on to a moving boat
A ball bearing striking another ball bearing
A heavy uniform chain lies on horizontal table top.If the coeffecient of friction between the chain and the table surface is 0.25,then the maximum friction of the length of the chain that can hang over one edge of the table is
20 %
25 %
35 %
15 %
A certain force applied to a mass m1 gives it an acceleration of 15 m/s2 .The same force applied to a mass m2 gives it an acceleration of 10 m/sec2 .If the two masses are fixed together and the same force is applied to the combination ,find the acceleration.
6 ms-2
0.6 ms-2
4 ms-2
none of these
