Physics
A ball is thrown vertically downwards from a height of 20 m with an initial velocity υ0. It collides with the ground, loses 50 percent of its energy in collision and rebounds to the same height. The initial velocity υ0 is (Take g=10ms^−2)
28
Aug
A ball is thrown vertically downwards from a height of 20 m with an initial velocity υ0. It collides with the ground, loses 50 percent of its energy in collision and rebounds to the same height. The initial velocity υ0 is (Take g=10ms^−2) A ball is thrown vertically downwards from a height of 20 m [...]
Two particles of masses m1,m2 move with initial velocities u1 and u2. On collision, one of the particles get excited to higher level, after absorbing energy ϵ. If final velocities of particles be v1 and v2 then we must have
28
Aug
Two particles of masses m1,m2 move with initial velocities u1 and u2. On collision, one of the particles get excited to higher level, after absorbing energy ϵ. If final velocities of particles be v1 and v2 then we must have after absorbing energy ϵ. If final velocities of particles be v1 and v2 then we [...]
Two identical balls A and B having velocities of 0.5 m/s and -0.3 m/s respectively collide elastically in one dimension. The velocities of B and A after the collision respectively will be
28
Aug
Two identical balls A and B having velocities of 0.5 m/s and -0.3 m/s respectively collide elastically in one dimension. The velocities of B and A after the collision respectively will be Two identical balls A and B having velocities of 0.5 m/s and -0.3 m/s respectively collide elastically in one dimension. The velocities of [...]
An engine pumps water continuously through a hose. Water leaves the hose with a velocity v and m is the mass per unit length of the water jet. What is the rate at which kinetic energy is imparted to water :
28
Aug
An engine pumps water continuously through a hose. Water leaves the hose with a velocity v and m is the mass per unit length of the water jet. What is the rate at which kinetic energy is imparted to water : A body of mass 3 kg is under a constant force which causes a [...]
A block of mass 10 kg is moving in x-direction with a constant speed of 10 m/s. It is subjected to a retarding force F = 0.1 x J/m during its travel from x=20m to x=30cm. Its final kinetic energy will be
28
Aug
A block of mass 10 kg is moving in x-direction with a constant speed of 10 m/s. It is subjected to a retarding force F = 0.1 x J/m during its travel from x=20m to x=30cm. Its final kinetic energy will be A body of mass 3 kg is under a constant force which causes [...]
A particle of mass 10 g moves along a circle of radius 6.4 cm with a constant tangential acceleration. What is the magnitude of this acceleration if the kinetic energy of the particle becomes equal to 8×10^−4 J boy the end of the second revolution after the beginning of the motion?
28
Aug
A particle of mass 10 g moves along a circle of radius 6.4 cm with a constant tangential acceleration. What is the magnitude of this acceleration if the kinetic energy of the particle becomes equal to 8×10^−4 J boy the end of the second revolution after the beginning of the motion? A Force F=20+10 y [...]
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:
28
Aug
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 body of mass 3 kg is under a constant force which causes a displacement s in metres in it,given by the relation s=1/3t^2 , where t is in seconds. Work done by the force in 2 seconds is:-
28
Aug
A body of mass 3 kg is under a constant force which causes a displacement s in metres in it,given by the relation s=1/3t^2 , where t is in seconds. Work done by the force in 2 seconds is:- A body of mass 3 kg is under a constant force which causes a displacement s [...]
A block of mass M is attached to the lower end of a vertical spring. The spring is hung from a ceiling and has force constant value k. The mass is released from rest with the spring initially unstretched. The maximum extension produced in the length of the spring will be :
28
Aug
A block of mass M is attached to the lower end of a vertical spring. The spring is hung from a ceiling and has force constant value k. The mass is released from rest with the spring initially unstretched. The maximum extension produced in the length of the spring will be : A Force F=20+10 [...]
Force F on a particle moving in a straight line varies with distance d as shown in figure. The work done on the particle during its displacement of 12m is:
28
Aug
Force F on a particle moving in a straight line varies with distance d as shown in figure. The work done on the particle during its displacement of 12m is: Force F on a particle moving in a straight line varies with distance d as shown in figure. The work done on the particle during [...]