Chapter 7 – Work, Energy and Power
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A ball is bouncing down a flight of stairs. The coefficient of restitution is e. The height of each step is d and the ball descends one step each bounce. After each bounce it rebounds to a height h above the next lower step. The height is large compared with the width of step so that the impacts are effectively head-on. Find the relationship between h and d.
17
Oct
A ball is bouncing down a flight of stairs. The coefficient of restitution is e. The height of each step is d and the ball descends one step each bounce. After each bounce it rebounds to a height h above the next lower step. The height is large compared with the width of step so [...]
A body of mass 5 kg moving with a speed of 1.5 m/s on a horizontal smooth surface collides with a nearly weightless spring of force constant k= 5 N/m. The maximum compression of the spring would be
17
Oct
A body of mass 5 kg moving with a speed of 1.5 m/s on a horizontal smooth surface collides with a nearly weightless spring of force constant k= 5 N/m. The maximum compression of the spring would be A body of mass 5 kg moving with a speed of 1.5 m/s on a horizontal smooth [...]
A force F acting on an object varies with distance x as shown in the figure. The force is in N and x in m. The work done by the force in moving the object from x=0 to x=6 m is:
17
Oct
A force F acting on an object varies with distance x as shown in the figure. The force is in N and x in m. The work done by the force in moving the object from x=0 to x=6 m is: A force F acting on an object varies with distance x as shown in [...]
A block of mass 2 kg is free to move along the x-axis. It is at rest and from t=0 onwards it is subjected to a time-dependent force F(t) in the x direction. The force F(t) varies with t as shown in the figure. The kinetic energy of the block after 4.5 seconds is:
17
Oct
A block of mass 2 kg is free to move along the x-axis. It is at rest and from t=0 onwards it is subjected to a time-dependent force F(t) in the x direction. The force F(t) varies with t as shown in the figure. The kinetic energy of the block after 4.5 seconds is: Maximum [...]
A bullet is fired from a rifle and the rifle recoils then K.E. of rifle is:
17
Oct
A bullet is fired from a rifle and the rifle recoils then K.E. of rifle is: A bullet is fired from a rifle and the rifle recoils then K.E. of rifle is: October 17, 2020 Category: AIIMS Last 24 Years Solved 1996 - 2019 Physics and Chemistry Video Solutions , Chapter 7 - Work, Energy [...]
A body of mass 10^3 kg moving with a speed 2 ms^−1 collides with a body of mass 15 x 10^3 inelastically and sticks to it. Then loss in KE of the system will be
17
Oct
A body of mass 10^3 kg moving with a speed 2 ms^−1 collides with a body of mass 15 x 10^3 inelastically and sticks to it. Then loss in KE of the system will be A body of mass 10^3 kg moving with a speed 2 ms^−1 collides with a body of mass 15 x [...]
If the water falls from a dam into a turbine wheel 19.6 m below, then the velocity of water at the turbine is (g=9.8m/s^2)
17
Oct
If the water falls from a dam into a turbine wheel 19.6 m below, then the velocity of water at the turbine is (g=9.8m/s^2) If the water falls from a dam into a turbine wheel 19.6 m below then the velocity of water at the turbine is (g=9.8m/s^2) October 17, 2020 Category: AIIMS Last 24 [...]
Initially spring in its natural length now a block at mass 0.25 kg is released than find out maximum force by the system on the floor?
17
Oct
Initially spring in its natural length now a block at mass 0.25 kg is released than find out maximum force by the system on the floor? Initially spring in its natural length now a block at mass 0.25 kg is released than find out maximum force by the system on the floor? October 17, 2020 [...]
A bomb of mass 3kg explodes in air into the pieces of mass 2kg and 1kg. The smaller mass goes at a speed of 80m/s. The total energy imparted to the two fragments is:
17
Oct
A bomb of mass 3kg explodes in air into the pieces of mass 2kg and 1kg. The smaller mass goes at a speed of 80m/s. The total energy imparted to the two fragments is: A bomb of mass 3kg explodes in air into the pieces of mass 2kg and 1kg. The smaller mass goes at [...]
A neutron makes a head on elastic collision with a stationary deuteron. The fractional energy loss of the neutron in the collision is?
17
Oct
A neutron makes a head on elastic collision with a stationary deuteron. The fractional energy loss of the neutron in the collision is? A neutron makes a head on elastic collision with a stationary deuteron. The fractional energy loss of the neutron in the collision is? October 17, 2020 Category: AIIMS Last 24 Years Solved [...]