Q.21)-The moment of inertia of a body does not depend upon its
- Axis of rotation
- Angular velocity
- Form of mass
- Distribution of mass
Q.22)-To open a door easily the handle should be fixed
- Near the hinges
- Away from mid-point opposite to hinges
- In the middle
- None of these
Q.23)-An object covers distance which is directly proportional to the square of the time. Its accelaration is
- Increasing
- Decreasing
- Zero
- Constant
Q.24)-An object with a constant speed
- Is not accelerated
- Might be accelerated
- Is always accelerated
- Also has a constant velocity
Q.25)-The average kinetic energy of the molecules of an ideal gas is directly proportional to an ideal gas is directly proportional to
- Velocity of molecules
- Mass of molecules
- Absolute temperature of the gas
- Temperature of enviroment
Q.26)-Why does a cannon recoil after firing?
- Conservation of energy
- Backward thrust of gases produces
- Newton's third law of motion
- Newton's first law of motion
Q.27)-Rate of change of momentum is
- Area
- Pressure
- Force
- Velocity
Q.28)-What is impulse equal to?
- Change in momentum
- Change in force
- Change in velocity
- Change in acceleration
Q.29)-Jet engine works on the principle of conservation of
- Heat
- Mass
- Linear momentum
- Angular momentum
Q.30)-Which of the following is not a unit of speed?
- m/s
- km/hr
- m2/hr
- cm/s