Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
Four different forms of energy:
(i) Solar energy
(ii) Mechanical energy
(iii) Wind energy
(iv) Nuclear energy
APPEARS IN
संबंधित प्रश्न
A pair of bullocks exerts a force of 140 N on a plough. The field being ploughed is 15 m long. How much work is done in ploughing the length of the field?
Soni says that the acceleration in an object could be zero even when several forces are acting on it. Do you agree with her? Why?
Define the term energy.
1 J = ______ calorie.
Define 1 joule of work.
How much work is done when a force of 2 N moves a body through a distance of 10 cm in the direction of force?
Each of the following statement describes a force acting. Which force is causing work to be done?
Distinguish between work and power.
A body of mass 60 kg has the momentum 3000 kgm/s-1. Calculate: the speed of the body.
(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?
