Work, Energy and Power questions
712 published questions with worked solutions.
- A tennis ball of mass 350 g is thrown vertically upwards at a speed of 4 m/s. If M is the maximum gravitational potential energy...
- A particle of mass m moves along x-direction under the force F(x) = F_0 (1 - x L ) for 0 x L. If the particle starts from rest at...
- What is the minimum horizontal speed given to the bob of a simple pendulum of length 50 cm so that it describes a complete circle...
- A particle of mass m is moving in a circular orbit under the influence of the central force F(r) = -kr, corresponding to the...
- Sand is being dropped from a stationary dropper at a rate of 0.5 kgs^ -1 on a conveyour belt moving with a velocity of 5 ms^ -1 ....
- A stone tied to a string of length L is whirled in a vertical circle with the other end of the string at the centre. At a certain...
- A lead bullet penetrates into a solid object and melts. Assuming that 40% of its kinetic energy is used to heat it, the initial...
- A pendulum of length 2 m consists of a wooden bob of mass 50 g. A bullet of mass 75 g is fired towards the stationary bob with a...
- A block of mass 2 kg moving on a horizontal surface with speed of 4 ms^ -1 enters a rough surface ranging from x = 0.5 m to x =...
- Water falls from a 40 m high dam at the rate of 9 10^ 4 kg per hour. Fifty percentage of gravitational potential energy can be...
- If momentum of a body is increased by 20%, then its kinetic energy increases by :
- A particle of mass 500 gm is moving in a straight line with velocity v = bx^ 5/2 . The work done by the net force during its...
- A particle of mass 10 g moves in a straight line with retardation 2x, where x is the displacement in SI units. Its loss of...
- A body of mass 5 kg is moving with a momentum of 10 kg ms^ -1 . Now a force of 2 N acts on the body in the direction of its...
- The momentum of a body is increased by 50%. The percentage increase in the kinetic energy of the body is________%.
- If the maximum load carried by an elevator is 1400 kg (600 kg – Passengers + 800 kg - elevator), which is moving up with a...
- A closed circular tube of average radius 15 cm, whose inner walls are rough, is kept in vertical plane. A block of mass 1 kg just...
- A block of mass 5 kg starting from rest pulled up on a smooth incline plane making an angle of 30º with horizontal with an...
- A force F =(2+3x) i acts on a particle in the x direction where F is in newton and x is in meter. The work done by this force...
- To maintain a speed of 80 km/h by a bus of mass 500 kg on a plane rough road for 4 km distance, the work done by the engine of...
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