Short Answer TypeRajan exerts a force of 150 N in pulling a cart at a constant speed of 10 m/s. Calculate the power exerted.
A nut is opened by a wrench of length 20 cm. If the least force required is 2 N, find the moment of force needed to loosen the nut.
Explain briefly why the work done by a fielder when he takes a catch in a cricket match is negative.
i) Define equilibrium
ii) In a beam balance when the beam is balanced in a horizontal position, it is in which equilibrium state?i) When a number of forces acting on a body produce no change in its state of rest or of the motion, the body is said to be in equilibrium.
ii) The beam balance is in the state of static equilibrium.
Give the expression for mechanical advantage of an inclined plane in terms of the length of an inclined plane.
Draw a simplified diagram of a lemon crusher, indicating the direction of load and effort.
The speed of light in glass is 2 × 105 km/s. What is the refractive index of the glass?
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