HARD
10th ICSE
IMPORTANT
Earn 100

Show that K=p22m, where K is kinetic energy and p is momentum of a particle of mass m

Important Questions on Work, Energy and Power

HARD
10th ICSE
IMPORTANT
A man of mass 60 kg runs up a height of 30 steps in 15 s. If each step is 20cm high, calculate the power developed by the man. Take g=10ms-2
MEDIUM
10th ICSE
IMPORTANT

State with reasoning whether the work done in the following cases is positive or negative: A water bucket is pulled up from well

MEDIUM
10th ICSE
IMPORTANT
State with reasoning whether the work done in the following case is positive or negative: A porter carrying a suitcase on his head on a level platform.
MEDIUM
10th ICSE
IMPORTANT
State with reasoning whether the work done in the following case is positive or negative: A ball falling freely under gravity.
MEDIUM
10th ICSE
IMPORTANT
State with reasoning whether the work done in the following case is positive or negative: Bob of the pendulum while moving towards mean position.
HARD
10th ICSE
IMPORTANT
State with reasoning whether the work done in the following case is positive or negative: Bob of the pendulum while moving away from the mean position.
MEDIUM
10th ICSE
IMPORTANT
Speed of the particle increases by 20%. How many per cent its kinetic energy increases? 
HARD
10th ICSE
IMPORTANT
Momentum of a particle is increases by 20%. How many percent its kinetic energy increases?