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20 kg
200 kg
Zero
100 kg
A manometer is used to measure
A mass m is pushed up an inclined plane, that makes an angle q with the horizontal as shown in figure. At the top of the inclined plane the speed of the mass is v. If the mass started from rest and the plane is frictionless, the work done is
A medical use thermometer has a kink in its hair tube?
A metal ball and a rubber ball, both having the same mass, strike a wall normally with the same velocity. The rubber ball rebounds and the metal ball does not rebound. It can be concluded that
A metal plate with a circular hole at the centre is heated. What will happen to the area of the hole
A mirage occurs because of
A mirror produces magnified erect image of an object. The nature of the mirror is
A motor running on electricity at the rate of 400 W raises a block of weight 120 N. If the block moves 8 m vertically in 4 s, the efficiency of the motor is
A moving body on Earth ordinarily comes to rest by itself because of the
A moving bullet hits a solid target resting on a frictionless surface and gets embedded in it. What is conserved in this process?
