Home
Class 9
PHYSICS
A force of 7 N acts on an object. The di...

A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force (see Figure below). Let us take it that the force acts on the object through the displacement. What is the work done in this case ?

Text Solution

Verified by Experts

We know that : `"Work done" = "Force " xx " Displacement"`
Or `W = F xx s`
Here Force,`F = 7 N`
And Displacement,`s = 8 m`
So, `W = 7 xx 8 J`
or `W = 56 J`
Thus, the work done in this case is 56 joules.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • WORK AND ENERGY

    LAKHMIR SINGH & MANJIT KAUR|Exercise Long Answer Type Questions|2 Videos

  • WORK AND ENERGY

    LAKHMIR SINGH & MANJIT KAUR|Exercise Multiple Choice Questions|1 Videos

  • WORK AND ENERGY

    LAKHMIR SINGH & MANJIT KAUR|Exercise Multiple Choice Questions|1 Videos

  • SOUND

    LAKHMIR SINGH & MANJIT KAUR|Exercise Value Based Questions|20 Videos

Similar Questions

Explore conceptually related problems

A force of 7N acts on an object. The displacement is, say 8m, in the direction of the force, Let us take it that the force acts on the object throughout the displacement. What is the work done in this case ?

A force of 5 N is acting on an object. The object is displaced through 2 m in the direction of the force (Fig. 11.2). If the force acts on the object all through the displacement, then work done is 5 N xx 2 m =10 N m or 10 J .

Knowledge Check

  • A force of 10N is acting on an object. The object is displaced through 5m in the directino of force. Then the work done is:

    A
    `-50J`
    B
    50J
    C
    `-50N`
    D
    50N

  • A force of 20 N acts on a body and the body moves through 1 m at an angle of 45^(@) in the direction of the force. The work done by the force is

    A
    `10 sqrt(2)` J
    B
    `(10)/(sqrt(2)) ` J
    C
    `- 10 sqrt(2) ` J
    D
    `(-10)/(sqrt(2)) ` J

  • When a net force acts on an object, the object will be accelerated in the direction of the force with an acceleration proportional to the

    A
    force on the object
    B
    velocity of the object
    C
    mass of the object
    D
    inertia of the object

    • Similar Questions

    Explore conceptually related problems

    A deivce used to measure the force acting on an object

    A force of 10 N on an object object .The object is placed through 5 m in the direction of force . What is the work done in this case

    A force of 5 N is acting on an object. The object is displaced through 2m in the direction of the force, if the forec acts all through the displacement, find the work done by the force.

    What are the effects of forces acting on the objects?

    A force (3hati+2hatj) N displaces an object through a distance (2hati-3hatj) m. The work done is :

    Home
    Profile