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A bimetal made copper and iron strips welded together is straight at room temperature. It is held vertically with iron strip towards left and copper strip towards right. If this bimetal is heated, it will
A bird sitting on a high tension electric wire does not get electrocuted as
A bird sitting on a high tension electric wire does not get electrocuted because
A block of mass m is pulled along a surface as shown. The coefficient of kinetic friction between the block and the surface is m and the tension in the rope is T. The acceleration of the block is
A block P released from the top of a smooth inclined plane slidesdown the plane. Another block Q is dropped from the same point and falls vertically downwards. Which one of the following statements will be true if the friction offered by air is negligible?
A boat carrying a number of large stones is floating in a water tank. If the stones are unloaded into the water, the level of water in the tank
A boat loaded with rocks floats in the middle of a swimming pool. A man in the boat throws the rocks overboard. The level of water in the pool will
A body absorbs heat most if it is
A body is initially moving with a velocity of 5 m/s. It undergoes an acceleration of 2 m/s2 for 4 seconds. Find the displacement (in m) of this body in these 4 seconds.
A body moving in a circular path with a constant speed has a
