Work, Energy and Power questions
712 published questions with worked solutions.
- The spring extends by x on loading, then the energy stored by the spring is: (If T is the tension in the spring and k is the...
- If we throw a body upwards with a velocity of 4 m/s, at what height does its kinetic energy reduce to half of the initial value?...
- A spring of force constant 800 N/m has an extension of 5 cm. The work done in extending it from 5 cm to 15 cm is
- If a body of mass 200 g falls from a height 200 m and its total PE is converted into KE at the point of contact with the earth's...
- The potential energy of a weightless spring compressed by a distance a is proportional to
- Four particles given have the same momentum. Which has maximum kinetic energy [Orissa PMT 2004]
- A particle is released from a height S. At a certain height its kinetic energy is three times its potential energy. The height...
- Two bodies A and B have masses 20 kg and 5 kg respectively. Each one is acted upon by a force of 4 kgwt. If they acquire the same...
- If momentum is increased by 20%, then kinetic energy increases by
- The decrease in the potential energy of a ball of mass 20 kg which falls from a height of 50 cm is [AIIMS 1997]
- If the kinetic energy of a body becomes four times its initial value, then new momentum will [AIIMS 1998, K CET 2002, J&K CET...
- If the kinetic energy of a body increases by 0.1%, the percent increase of its momentum will be
- The kinetic energy of a body of mass 3 kg and momentum 2 Ns is
- If a lighter body (mass M₁ and velocity V₁) and a heavier body (mass M₂ and velocity V₂) have the same kinetic energy, then [MP...
- A body moving with velocity v has momentum and kinetic energy numerically equal. What is the value of v?
- A 0.5 kg ball is thrown up with an initial speed 14 m/s and reaches a maximum height of 8.0 m. How much energy is dissipated by...
- If the K.E. of a body is increased by 300%, its momentum will increase by
- If the K.E. of a particle is doubled, then its momentum will [EAMCET 1979, CPMT 2003, Kerala PMT 2005, RPMT 2006]
- In which case does the potential energy decrease [MP PET 1996]
- A spring gun of spring constant 90 N/cm is compressed 12 cm by a ball of mass 16 g. If the trigger is pulled, the velocity of the...
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