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संबंधित प्रश्न
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?
If the work done by a force in moving an object through a distance of 20 cm is 24.2 J, what is the magnitude of the force?
How much work is done by the gravitational force of earth acting on a satellite moving around it in a circular path? Give reason for your answer.
Determine the amount of work done when an object is displaced at an angle of 30° with respect to the direction of the applied force.
Why does a spanner have a long handle?
Fill in the boxe to show the corresponding energy transformation.
A canon ball of mass 500g is fired with a speed of 15m/s-1. Find: its momentum.
Define Translational motion.
(i) A 200g ball is thrown vertically upward with an initial velocity of 30 ms-1. Draw a velocity-time graph for the motion of ball.
(ii) How long will the ball take to reach the highest point?
(iii) What will be the kinetic energy of ball, when it returns to the starting point, neglecting the air resistance?
(iv) What will be the potential energy of ball at highest point?
A force is applied on a body of mass 20 kg moving with a velocity of 40 ms−1. The body attains a velocity of 50 ms−1 in 2 seconds. Calculate the work done by the body.
A water pump raises 50 kg of water through a height of 25 m in 5s. Calculate the power supplied by the pump (Take: g = 10 N kg−1).
A car is accelerated on a levelled road and attains a velocity 4 times of its initial velocity. In this process the potential energy of the car
