Advertisements
Advertisements
प्रश्न
In what way does an ‘Ideal machine’ differ from a ‘Practical machine’?
Advertisements
उत्तर
Ideal machine has 100% efficiency i.e., work done on the machine = work done by the machine.
संबंधित प्रश्न
Explain briefly why the work done by a fielder when he takes a catch in a cricket match is negative.
How is work related to energy?
Give reasons for the following A teacher moving around in the class is doing work but a child standing and reading a book is not doing any work.
Find the kinetic energy of a body of mass 1 kg moving with a uniform velocity of 10 m s-1.
Is the motion of moon around the earth in circular path an accelerated motion?
Fill in the boxe to show the corresponding energy transformation.
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?
