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When a body is placed on a table top, it exerts a force equal to its weight downwards on the table top but does not move or fall

1) Name the force exerted by the table top
2) What is the direction of the force?
Give the expression for mechanical advantage of an inclined plane in terms of the length of an inclined plane.
kWh is the unit of ______.
Name the quality which is measured in Wh.
In which one of the following cases is the work done more? When the angle between the direction of motion and that of the force is (i) 90° (ii) 0°.
1 kWh = ______ J.
State and define the unit of force in the S.I. system.
Justify the statement. “Power can be expressed as the product of force and velocity.”
The world record for weight lifting was held by Sergei Didyk of the USSR. He lifted 261 kg to a height of 2.3 m in 4s; find:
(a) Weight lifted by him
(b) Work done by him
(c) Power developed by him. (g = 10m/s2)
