Chapter 4 – Work, Energy and Power
Sahay Sir > Question Answers > JEE Mains Physics 2002-2019 Solved Video Solutions > Chapter 4 - Work, Energy and Power
A particle moves in a straight line with retardation proportional to its displacement. Its loss in kinetic energy for any displacement x is proportional to
27
Oct
A particle moves in a straight line with retardation proportional to its displacement. Its loss in kinetic energy for any displacement x is proportional to A particle moves in a straight line with retardation proportional to its displacement. Its loss in kinetic energy for any displacement x is proportional to October 27, 2020 Category: Chapter [...]
The block of mass M moving on the frictionless horizontal surface collides with the spring constant k and compresses it by length L . The maximum momentum of the block after collision is
27
Oct
The block of mass M moving on the frictionless horizontal surface collides with the spring constant k and compresses it by length L . The maximum momentum of the block after collision is The block of mass M moving on the frictionless horizontal surface collides with the spring constant k and compresses it by length [...]
A spherical ball of mass 20kg is stationary at the top of a hill of height 100m , it rolls down a smooth surface to the ground , then climbs up another bill of height of 30m and final rolls down to a horizontal base at a height of 20m about the ground . The velocity attained by the ball is
27
Oct
A spherical ball of mass 20kg is stationary at the top of a hill of height 100m , it rolls down a smooth surface to the ground , then climbs up another bill of height of 30m and final rolls down to a horizontal base at a height of 20m about the ground . The [...]
A bullet fired into a fixed target loses half of its velocity after penetrating 3cm. How much further it will penetrate before coming to rest assuming that it faces constant resistance to motion?
27
Oct
A bullet fired into a fixed target loses half of its velocity after penetrating 3cm. How much further it will penetrate before coming to rest assuming that it faces constant resistance to motion? A bullet fired into a fixed target loses half of its velocity after penetrating 3cm. How much further it will penetrate before [...]
A mass ‘m’ moves with a velocity ‘v’ and collides inelastically with another identical mass . After collision the 1st mass moves with velocity v/3–√ in a direction perpendicular to the initial direction of motion. Find the speed of the 2nd mass after collision.
27
Oct
A mass ‘m’ moves with a velocity ‘v’ and collides inelastically with another identical mass . After collision the 1st mass moves with velocity v/3–√ in a direction perpendicular to the initial direction of motion. Find the speed of the 2nd mass after collision. A force acts on a 2 kg object so that its [...]
A block of mass 0.50kg is moving with a speed of 2.00cm^−1 can a smooth surface . It strikes another mass of 1.00kg and then they move together as a single body . The energy loss during the collision is
27
Oct
A block of mass 0.50kg is moving with a speed of 2.00cm^−1 can a smooth surface . It strikes another mass of 1.00kg and then they move together as a single body . The energy loss during the collision is A force acts on a 2 kg object so that its position is given as [...]
A bomb of mass 16kg at rest explodes into two pieces of masses 4 kg and 12 kg. The velocity of the 12 kg mass is 4ms^−1. The kinetic energy of the other mass is
27
Oct
A bomb of mass 16kg at rest explodes into two pieces of masses 4 kg and 12 kg. The velocity of the 12 kg mass is 4ms^−1. The kinetic energy of the other mass is A bomb of mass 16kg at rest explodes into two pieces of masses 4 kg and 12 kg. The velocity [...]
An athlete in the Olympic games covers a distance of 100m in 10s. His kinetic energy can be estimated to be in the range
27
Oct
An athlete in the Olympic games covers a distance of 100m in 10s. His kinetic energy can be estimated to be in the range An athlete in the Olympic games covers a distance of 100m in 10s. His kinetic energy can be estimated to be in the range October 27, 2020 Category: Chapter 4 - [...]
Statement -1: Two particles moving in the same direction do not lose all their energy in a completely inelastic collision. Statement -2 : Principle of conservation of momentum holds true for all kinds of collisions.
27
Oct
Statement -1: Two particles moving in the same direction do not lose all their energy in a completely inelastic collision. Statement -2 : Principle of conservation of momentum holds true for all kinds of collisions. A force acts on a 2 kg object so that its position is given as a function of time as [...]
At time t=0s particle starts moving along the x− axis. If its kinetic energy increases uniformly with time ‘t’, the net force acting on it must be proportional to
27
Oct
At time t=0s particle starts moving along the x− axis. If its kinetic energy increases uniformly with time ‘t’, the net force acting on it must be proportional to At time t=0s particle starts moving along the x− axis. If its kinetic energy increases uniformly with time 't' the net force acting on it must [...]