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प्रश्न
Name the quality which is measured in Wh.
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उत्तर
Energy is measured in Wh
संबंधित प्रश्न
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, indicting of load and effort
State the condition when the work done by a force is positive. Explain with the help of examples.
A body is moved in a direction opposite to the direction of force acting on it. State whether the work is done by the force or work is done against the force
A body is provided at a point. A force of 20 N is applied at a distance of 40 cm from the pivot. Find the moment of force about the pivot.
The moment of a force 10 N about a point 0 is 4 Nm. Calculate the distance of point of application of force from the point 0.
Work is a scalar quantity because it is a measure of transfer of energy without indicating any direction
It takes 20 s for a person A of mass 50 kg to climb up the stairs, while another person B of same mass does the same in 15 s. Compare the power developed by the persons A and B.
A coolie carrying a load on his head and moving on a frictionless horizontal platform does no work. Explain the reason why.
A force of 1 kgf displaces a body by a distance of 10 cm
(i) in direction of force,
(ii) normal to the force
(iii) at an angle of 60° to the direction of the force.
Calculate the amount of work done in each case. (Take: g = 9.8 ms−2 )
