Class XI

Two bodies of masses m1 and m2 have equal kinetic energies. If p1 and p2 are their respective momentum, then ratio p1 : p2 is
  1. m1 : m2
  2. m2 : m1
  3. √m1 : √m2
  4. m12 : m22
Which of the following is NOT correct?
  1. energy is the ability of doing work
  2. Work can be expressed as Force x Displacement
  3. unit of power is Joule
  4. power is the amount of work done per unit of time
Newton-meter is the SI unit of
  1. acceleration
  2. work
  3. power
  4. Force
Which of the following is/are example(s) of Potential Energy
  1. A moving car
  2. A battery
  3. A book resting on the table
  4. both b and c
Considering air resistance negligible, the sum of potential and kinetic energies of the free falling body would be
  1. zero
  2. would increase
  3. would decrease
  4. remains fixed
Time Elapsed

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