English

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

Advertisements
Advertisements

Question

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

Options

  • 0°

  • 45°

  • 90°

  • 180°

MCQ
Advertisements

Solution

180°

Explanation:

Work done is negative when a force acts opposite to the direction of displacement, i.e. the angle between the two directions is 180°.

shaalaa.com
  Is there an error in this question or solution?
Chapter 11: Work and Energy - Multiple Choice Questions [Page 68]

APPEARS IN

NCERT Exemplar Science Exemplar [English] Class 9
Chapter 11 Work and Energy
Multiple Choice Questions | Q 3. | Page 68
Lakhmir Singh Physics [English] Class 10 ICSE
Chapter 2 Work, Power and Energy
EXERCISE | Q 2. | Page 47

RELATED QUESTIONS

Does the transfer of energy take place when you push a huge rock with all your might and fail to move it? Where is the energy you spend going?


A ball is placed on a compressed spring. What form of energy does the spring possess? On releasing the spring, the ball flies away. Give a reason.


A body falls freely under gravity from rest. Name the kind of energy it will possess while falling.


A ball of mass 0.20 kg is thrown vertically upwards with an initial velocity of 20 m s-1. Calculate the maximum potential energy it gains as it goes up.


Is energy a vector quantity?


State whether the object possess kinetic energy, potential energy, or both :
A ceiling fan in the off position ______________


Fill in the blank with suitable word :
The ability of a body to do work is called __________. The ability of a body to do work because of its motion is called __________. 


A boy weighing 40 kg makes a high jump of 1.5 m.
What is his potential energy at the highest point? (g = 10 m/s2)


Define the term 'energy' of a body. What is the SI unit of energy.


Water stored in a dam possesses ______.


Name the device or machine which convert :
Chemical energy into electrical energy.


Name the device or machine which convert :
Electrical energy into heat energy.


Name the device or machine which convert :
Electrical energy into light energy.


Fill in the blanks with suitable words :
The principle of ___________ of energy says energy can be transformed from one form to another, but it cannot be ___________ or ___________.


Describe the energy changes which take place in a radio.


How much electric energy in kWh is consumed by an electrical appliance of 1000 watts when it is switched on for 60 minutes?


A ball falls to the ground as shown below :

What is the potential energy of ball at B?


A ball falls to the ground as shown below :

Which law you have made use of in answering this question?


Which of the following energy change involves frictional force?


A girl with having a mass of 35 kg sits on a trolley of mass 5 kg. The trolley is given an initial velocity of 4 m s–1 by applying a force. The trolley comes to rest after traversing a distance of 16 m. (a) How much work is done on the trolley? (b) How much work is done by the girl?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×