Question Answers
Sahay Sir > Question Answers
A ball is dropped from a height h onto a floor and rebounds to a height h/16. The coefficient of restitution between the ball and the floor is
22
Oct
A ball is dropped from a height h onto a floor and rebounds to a height h/16. The coefficient of restitution between the ball and the floor is A ball is dropped from a height h onto a floor and rebounds to a height h/16. The coefficient of restitution between the ball and the floor [...]
A 2kg ball , moving at 10m/s , collides head – on with a 3kg ball moving in the opposite direction at 20m/s. If the coefficient of restitution is 1/3 , then the energy lost in the collision is
22
Oct
A 2kg ball , moving at 10m/s , collides head – on with a 3kg ball moving in the opposite direction at 20m/s. If the coefficient of restitution is 1/3 , then the energy lost in the collision is A 2kg ball collides head - on with a 3kg ball moving in the opposite direction [...]
A block of mass m moving with speed v0 strikes another particle of mass 2m at rest. If collision is head – on and the coefficient of restitution e=1/2 , then the loss in kinetic energy will be
22
Oct
A block of mass m moving with speed v0 strikes another particle of mass 2m at rest. If collision is head – on and the coefficient of restitution e=1/2 , then the loss in kinetic energy will be A block of mass m moving with speed v0 strikes another particle of mass 2m at rest. [...]
Two balls of masses 2m and m are moving with speed 2v0 and v0 towards each other. If the coefficient of restitution e=1/3 , the speed of balls , if collision is head – on
22
Oct
Two balls of masses 2m and m are moving with speed 2v0 and v0 towards each other. If the coefficient of restitution e=1/3 , the speed of balls , if collision is head – on if collision is head - on the speed of balls Two balls of masses 2m and m are moving with [...]
A set of n identical cubical blocks lies at rest parallel to each other along a line on a smooth horizontal surface. The separation between the near surfaces of any two adjacent blocks is L . The block at one end is given a speed v towards the next one at time t = 0 . All collisions are completely inelastic, then
22
Oct
A set of n identical cubical blocks lies at rest parallel to each other along a line on a smooth horizontal surface. The separation between the near surfaces of any two adjacent blocks is L . The block at one end is given a speed v towards the next one at time t = 0 [...]
Three objects A ,B and C are kept in a straight line on a smooth horizontal surface. These have masses m, 2m and 3m , respectively . The head – on elastic collision takes place between A and B and then B makes completely inelastic collision with C. All motions occur on the same straight line. The final speed of C will be
22
Oct
Three objects A ,B and C are kept in a straight line on a smooth horizontal surface. These have masses m, 2m and 3m , respectively . The head – on elastic collision takes place between A and B and then B makes completely inelastic collision with C. All motions occur on the same straight [...]
A block of mass 2m is attached to a string of length L=5m. The block is released when the string is horizontal , it picks up a particle of 2m kept at rest at the lowest point. The maximum height attached by the combined mass is
22
Oct
A block of mass 2m is attached to a string of length L=5m. The block is released when the string is horizontal , it picks up a particle of 2m kept at rest at the lowest point. The maximum height attached by the combined mass is A block of mass 2m is attached to a [...]
Consider the situation as shown in the diagram. The bullet penetrates the block and emerges with speed v0/3. If after collision , the string becomes horizontal , v0 will be
22
Oct
Consider the situation as shown in the diagram. The bullet penetrates the block and emerges with speed v0/3. If after collision , the string becomes horizontal , v0 will be Consider the situation as shown in the diagram. The bullet penetrates the block and emerges with speed v0/3. If after collision the string becomes horizontal [...]
A bullet of mass 20g moving horizontally strikes a block of mass 480g suspended by a string of length 2m. If the collision is completely inelastic , the minimum velocity of bullet , so that the combined mass complete vertical circle should be
22
Oct
A bullet of mass 20g moving horizontally strikes a block of mass 480g suspended by a string of length 2m. If the collision is completely inelastic , the minimum velocity of bullet , so that the combined mass complete vertical circle should be A bullet of mass 20g moving horizontally strikes a block of mass [...]
A bullet of mass 10g moving horizontally with a speed of 400m/s a block of mass 390g and remains in it. The block slides 10m on rough surface before coming to rest. The friction coefficient is
22
Oct
A bullet of mass 10g moving horizontally with a speed of 400m/s a block of mass 390g and remains in it. The block slides 10m on rough surface before coming to rest. The friction coefficient is A bullet of mass 10g moving horizontally with a speed of 400m/s a block of mass 390g and remains [...]