Home
Class 9
PHYSICS
When is work done by a force positive ?...

When is work done by a force positive ?

Text Solution

Verified by Experts

Work done by a force is positive if force and displacement are in the same direction.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • WORK AND ENERGY

    PRADEEP|Exercise Short Answer Questions 2 marks|10 Videos

  • WORK AND ENERGY

    PRADEEP|Exercise Short Answer Question 3 marks|9 Videos

  • WORK AND ENERGY

    PRADEEP|Exercise Long Answer Questions|8 Videos

  • SOUND

    PRADEEP|Exercise Model Test (sec - B)|12 Videos

Similar Questions

Explore conceptually related problems

When is work done by a force negative ?

When is work done by a force zero ?

Knowledge Check

  • the work done by applied force is

    A
    10 J
    B
    50 J
    C
    100 J
    D
    150 J

  • When work done on a particle is positive, then its

    A
    KE increases
    B
    KE decreases
    C
    KE remains constant
    D
    momentum increases

  • When work done by force of gravity is negative, then

    A
    PE increases
    B
    KE increases
    C
    PE remains constant
    D
    PE decrease

    • Similar Questions

    Explore conceptually related problems

    How is work done by a force meaured ?

    Assertion:The work done by a conservative force such as gravity depends on the initial and final positions only Reason: The work done by a force can not be calculated if the exact nature of the force is not known.

    Statement -1: The work done by all forces on a system equals to the change in kinetic energy of that system . This statement is true even if nonconservative forces act on the system. Statement -2: The total work done by internal forces may be positive.

    If the amount of work done by a force depends only on the initial and final positions of the object which has been moved, then such a force is called

    Assertion : When a gas is allowed to expand, work done by gas is positive. Reason : Force due to gaseous pressure and displacement (of piston) are in the same direction

    Home
    Profile