Two bodies A and B have masses 20 Kg and 5 Kg respectively. Each one is acted
Two bodies A and B have masses 20 Kg and 5 Kg respectively. Each one is acted upon by a force of 4 kg wt. If they acquire the same kinetic energy in times tᴀ […]
Work Energy and Power
A block of mass 0.50 kg is moving with a speed of 2.00 ms⁻¹ on a smooth surface.
A block of mass 0.50 kg is moving with a speed of 2.00 ms⁻¹ on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The […]
A uniform chain of length L and mass m is kept on a smooth table. It is released
A uniform chain of length L and mass m is kept on a smooth table. It is released from rest when the overhanging part was nᵗʰ fraction of total length. Find the kinetic energy of […]
A bomb of mass 16 kg at rest explodes into two pieces of masses of 4 kg and 12 kg.
A bomb of mass 16 kg at rest explodes into two pieces of masses of 4 kg and 12 kg. The velocity of the 12 kg mass is 4 ms⁻¹. The kinetic energy of the […]
A neutron is moving with a velocity u.It collides head on and elastically with an atom
A neutron is moving with a velocity u.It collides head on and elastically with an atom of mass number A. If the initial kinetic energy of the neutron be E. How much kinetic energy will […]
A force of 10N is applied on a body for 3 sec and the corresponding displacement 6 m.
A force of 10N is applied on a body for 3 sec and the corresponding displacement 6 m. The power of the source is
Options
(a) 20 W (b) 25 W (c) 40 W […]
In the elastic collision of objects
In the elastic collision of objects
Options
(a) Only momentum remains constant (b) Only K.E remains constant (c) Both remain constant (d) None of these
Correct Answer:
Both remain constant
Explanation:
No explanation […]
If a body is rolling on the surface, its total energy will be
If a body is rolling on the surface, its total energy will be
Options
(a)(1/2) mv² – (Gm₁m₂/R) (b) (1/2) mv² + (1/2) Iω² (c) (1/2) mv² – (1/2) mR²ω² (d) None
Correct […]
A spring when stretched by 2mm containing energy 4 J. If it is stretched
A spring when stretched by 2mm containing energy 4 J. If it is stretched by 10 mm, its potential energy becomes equal to
Options
(a) 4 J (b) 54 J (c) 415 J (d) […]
A body of mass 3 kg acted upon by a constant force is displaced by S meter
A body of mass 3 kg acted upon by a constant force is displaced by S meter, given by relation S=1/3t², where t is in second. Work done by the force in2 seconds
Options […]