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संबंधित प्रश्न
In each of the following a force, F is acting on an object of mass, m. The direction of displacement is from west to east, as shown by the longer arrow. Observe the diagrams carefully and state whether the work done by the force is negative, positive or zero.
Why is a jack screw provided with a long arm?
A force acts on a body and displaces it by a distance S in a direction at an angle θ with the direction of the force. What should be the value of θ to get the maximum positive work?
No work is done by a force if the body
Define the term energy.
State the energy transformation on the following:
Electricity is obtained from solar energy.
How much work is done when a body of mass m is raised to a height h above the ground?
What is the work done against gravity when a body is moved horizontally along a frictionless surface?
What is meant by a translational motion? Give one example.
A man lifts a mass of 10 kg from the floor to a shelf 4 meter high. If g = 10 ms-2, what is the work done?
What do you mean by a kilo joule?
How many joules are there in 1 mega joule?
Fill in the boxe to show the corresponding energy transformation.
How much energy is gained by a box of mass 20 kg when a man, runs carrying the box with a speed of 3 m/s-1 to catch the bus?
An electric motor pump is 60% efficient and is rated 2.5 H.P. Calculate the maximum load it can lift through a height of 10m in 8 sec. (1 H.P. = 750 W).
Who is the odd one out?
