Advertisements
Advertisements
Question
Advertisements
Solution
Given mass m = 1000 kg
velocity v = 72 km/hr = 20 m/s
Now K.E = `1/2` mv2 = `1/2` (1000)(20)2
or,K.E = 2 x 105 J
APPEARS IN
RELATED QUESTIONS
What is the work done by the moon when it revolves around the earth?
Write the expression for work done by a force.
In which of the following cases, is work being done?
(i) A man pushing a wall.
(ii) a coolie standing with a load of 12 kgf on his head.
(iii) A boy climbing up a staircase.
State the SI unit of work.
When is the work done by a force on a body : (a) positive, (b) negative, and (c) zero?
In which of the following case the work done by a force will be maximum : when the angle between the direction of force and direction of motion is 0° or 90°?
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.
Complete the following sentences:
Joule is the unit of .......
What do you understand by 'potential energy' and 'Kinetic energy'? Give three examples of each to illustrate your answer.
