Home
Class 11
PHYSICS
When a force (8i + 4j) newton displace a...

When a force `(8i + 4j)` newton displace a particle through `(3i- 3j)` metre, the power is 0.6W. The time of action of the force is

A

20 s

B

7.2 s

C

72 s

D

2 s

Text Solution

Verified by Experts

The correct Answer is:
A
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • WORK, POWER & ENERGY

    AAKASH SERIES|Exercise EXERCISE - II (WORK)|20 Videos

  • WORK, POWER & ENERGY

    AAKASH SERIES|Exercise EXERCISE - II (ENERGY)|33 Videos

  • WORK, POWER & ENERGY

    AAKASH SERIES|Exercise EXERCISE - I|78 Videos

  • WORK POWER ENERGY

    AAKASH SERIES|Exercise EXERCISE - 3|61 Videos

Similar Questions

Explore conceptually related problems

A force 2i + j - k newton acts on a body which is initially at rest. At the end of 20 seconds the velocity of the body is 4i + 2j - 2k ms^(-1) . What is the mass of the body ?

A variable force, given by the 2-dimensional vector vec(F)=(3x^(2)hat(i)+4hat(j)) , acts on particle. The force is in newton and x is in metre. What isd the change in the kinetic energy of the particle as it moves from the point with coordinates (2,3) to (3,0) ? (The coordinates are in metres)

Knowledge Check

  • When a force (8hat(i) + 4hat(j)) newton displaces a particle through (3hat(i) - 3hat(j)) metre, the power is 0.6W. The time of action of the force is

    A
    20s
    B
    7.2s
    C
    72s
    D
    2s

  • When a force (8hat(i)+4hat(j)) newton displaces a particle through (3hat(i)-3hat(j)) metre, the power is 0.6 W. The time of action of the force is

    A
    20 s
    B
    7.2 s
    C
    72 s
    D
    2s

  • A particle acted on by constant forces 4i + j - 3k and 3i + j - k is displaced from the point I + 2j + 3k to the point 5i + 4j + k. The total work done by the forces is

    A
    20 unit
    B
    30 unit
    C
    40 unit
    D
    50 unit

    • Similar Questions

    Explore conceptually related problems

    Three forces having magnitude 5,4 and 3 units act on a particle in the directions 2i - 2j + k, i + 2j + 2k and -2i + j - 2k respectively and the particle gets displaced from the point A whose vector is 6i - 2j + 3k to the point whose position vector is 9i + 7j + 5k. Then the work done by these forces is

    The work done by the force F = 2i - 3j + 2k in moving a particle from (3,4,5) to (1,2,3) is

    Force acting on a particle is (2 hat(i) + 3hat(j))N . Work done by this force is zero, when a particle is moved along the line 3y+ kx =5 . Here the value of k is

    If forces of magnitudes 6 and 7 units acting in the direction I - 2j +2k and 2i - 2j - k, I + 2j + 2k and -2i + j - 2k respectively act on a particl which is displaced from P (2, -1, -3) to Q (5, -1, 1) then the work done by the forces is

    Force acting on a particle is (2hat(i)+3hat(j)) N. Work done by this force is zero, when a particle is moved along the line 3y+kx=5 . Here the value of k is.

    Home
    Profile