A drum of radius R and mass M ,rolls down without slipping along an inclined plane of angle θ.The frictional force
converts translational energy to rotational energy
dissipates energy as heat
decreases the rotational motion
decreases the rotational and translational motion
A body of mass 2 kg ,moving on a horizontal surface with an initial velocity of 4 m/s , comes to rest after 2 s.If one wants to keep this moving on the same surface with a velocity of 4 m/s,the force required is
2 N
4 N
6 N
10 N
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
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 ?
18 N
8 N
A 10 kg stone is suspended with a rope of breaking stength 30 kg wt.The minimum time in which the stone can be raised through a height 10 m starting from rest is (taking g = 10 N/kg):
0.5 seconds
1.0 seconds
√2 / √3 seconds
2.0 seconds
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
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 force of 15 Newton acts on a body of weigh 30 Newton. What is the acceleration produced in metres per second?
Take g = 10ms-2.
15.00
5.00
1.50
0.50
An army vehicle of mass 1000 kg is moving with a velocity of 10 m/s and is acted upon by a forward force of 1000 N due to engine and a retarding force of 500 N due to friction.What will be its velocity after 10 sec ?
5 m/s
10 m/s
15 m/s
20 m/s
A man slides down a light rope whose breaking strength is η times his weight .What should be his maximum acceleration so that the rope does not break ?
g (1 - η)
ηg
g /1+η
g/1 - η
