मराठी

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 - Physics

Advertisements
Advertisements

प्रश्न

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

State whether work is done or not, by writing yes or no, in the following case:

A coolie stands with a box on his head for 15 min.

पर्याय

  • Yes

  • No

MCQ
एक शब्द/वाक्यांश उत्तर

उत्तर

No.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 1: Force, Work, Power and Energy - Short Answers

APPEARS IN

आईसीएसई Physics [English] Class 10
पाठ 1 Force, Work, Power and Energy
Short Answers | Q 47.3

संबंधित प्रश्‍न

The energy of a body is its capacity to do .........


The power of a motor is 40 kW. At what speed can the motor raise a load of 20,000 N?


In case of negative work, the angle between the force and displacement is :


Choose one or more correct alternatives.

Joule is the unit of ______.

  1. force
  2. work
  3. power
  4. energy

What is meant by a translational motion? Give one example.


Is work done a scalar or a vector physical quantity?


A man lifts a mass of 10 kg from the floor to a shelf 4 meter high. If g = 10 ms-2, what is the work done?


How is energy stored in a clock?

Name the type of energy possessed by a
(i) stretched catapult        (ii) hot iron
(iii) wound up clock


Can we destroy every energy associated with a body?

In what form is energy stored in a wrist watch?

A block of mass 20 kg is pulled up a slope (fig.12) with a constant speed by applying a force of 500 N parallel to the slope. A and B are initial and final positions of the block.
(a)    Calculate the work done by the force in moving the block from A and B.
(b)    Calculate the potential energy gained by the block.


A water pump raises 80 kg of water through a height of 20 m in 10 s. Calculate the power of the pump.

State the energy changes which take place when A piece of magnesium wire is burnt in a jar of oxygen.


Give an example 

Chemical energy changes to electrical energy.


A canon ball of mass 500g is fired with a speed of 15m/s-1. Find: its momentum.


An electric motor of power 100 W is used to drive the stirrer in a water bath. If 50% of the energy supplied to the motor is spent in stirring the water. Calculate the work done on the water in one minute.


Who is the odd one out?


Look at the activity below. Reason out whether or not work is done in the light of your understanding of the term ‘work’.

A green plant is carrying out photosynthesis.


Work done by this force at any instant is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×