मराठी

Define 1 J of work. - Science

Advertisements
Advertisements

प्रश्न

Define 1 J of work.

एका वाक्यात उत्तर

उत्तर

1 J is the amount of work done by a force of 1 N on an object that displaces it through a distance of 1 m in the direction of the applied force.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 11: Work and Energy - Intext Questions [पृष्ठ १४९]

APPEARS IN

एनसीईआरटी Science [English] Class 9
पाठ 11 Work and Energy
Intext Questions | Q 3 | पृष्ठ १४९

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

Derive a relationship between S.I. and C.C.S. unit of work


State the S.I. unit of work and define it.


A body of mass 5 kg falls from a height of 10 m to 4 m. Calculate:

The loss in potential energy of the body, 


What are the units of (a) work, and (b) energy?


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?


The work done by a force acting obliquely is given by the formula : W = F cos θ ✕ s. What will happen to the work done if angle θ between the direction of force and motion of the body is increased gradually? Will it increase, decrease or remain constant.


Draw a neat labeled diagram to show the direction of two forces acting on a body to produce rotation in it. Also mark the point about which rotation takes place.


A man carrying a suitcase in his hand is walking horizontally. What is the work done against gravity?


Write an expression for work done by a force depends?


What is the amount of energy spent by the heart in pumping blood through the body?

Name four different forms of energy.

An electric motor drives a machine which lifts a mass of 4 kg through a height of 10 m in 5 s at a constant speed. Assuming g = 10 ms-2, calculate

(i) the amount of work done,    (ii) the power of the machine.


Calculate the amount of work done by a child carrying a bag of 20 kg when he moves a distance of 40 m in
(a) Vertical direction, and
(b) Horizontal direction


Define energy and name its unit.

Define Translational motion.


In the following case write yes, if the work is being done and no if no work is being done.

A coolie standing with a heavy load on his head


Why is less effort needed to lift a load over an inclined plane as compared to lifting the load directly?


In what way does an ‘Ideal machine’ differ from a ‘Practical machine’?


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).


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×