Home
Class 12
PHYSICS
A block of mass 2 kg is plased on a smoo...

A block of mass 2 kg is plased on a smooth horizontal surface. Two forces `F_(1)=20` N and `F_(2)=5` N start acting on the block in opposite directions as shown. If block gets displaced by 5 m in the direction of net force then work done by `F_(2)` is :-

A

`-75J`

B

`75 J`

C

`-25J`

D

`25 J`

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • WORK, ENERGY AND POWER

    AAKASH INSTITUTE|Exercise Assignment (SECTION - A)|67 Videos
  • WORK, ENERGY AND POWER

    AAKASH INSTITUTE|Exercise Assignment (SECTION - B)|39 Videos
  • WORK, ENERGY AND POWER

    AAKASH INSTITUTE|Exercise SECTION-J (AAKASH CHALLENGERS QUESTIONS)|14 Videos
  • WAVES

    AAKASH INSTITUTE|Exercise ASSIGNMENT ( SECTION-D ( Assertion - Reason Type Questions ))|12 Videos

Similar Questions

Explore conceptually related problems

Two blocks A and B each of mass m are placed on a smooth horizontal surface. Two horizontal force F and 2F are applied on blocks A and B, respectively, as shown in fig. Block A does not slide on block B. Then then the normal reaction acting between the two blocks is (assume no friction between the blocks)

Two blocks 'A' and 'B' each of mass 'm' are placed on a smooth horizontal surface . Two horizontal force F and 2F are applied on the blocks A and B , respectively , as shown in figure . The block A does not slide on block B . The normal reaction acting between the two blocks is

A block of mass 5 kg is initially at rest on a rough horizontal surface. A force of 45 N acts over a distance of 2 m . The force of friction acting on the block is 25 N . The final kinetic energy of the block is

A block of mass 10 kg is placed on a horizontal surface as shown in the figure and a force F = 100 N is applied on the block as shown, in the figure. The block is at rest with respect to ground. If the contact force between block and ground is 25n (in Newton) then value of n is : (Take g = 10 m//s^(2))

A block of mass 2 kg is placed on the floor (mu=0.4) . A horizontal force of 7 N is applied on the block. The force of friction between the block & floor is f_(s) . Find the f_(s) .

A block of mass 8 kg is kept on a rough floor. The coefficients of friction are mu_(s) = 0.5 and mu_(k) = 0.4 . Force F_(1) = 15 N and F_(2) = 20 N are applied on the block as shown. (a) Find the magnitude and the direction of friction force . (b) If F_(1) = 30 N , F_(2) = 40 N , find the acceleration of the block.

A block of mass, 2 kg is kept on a smooth surface as shown. It is being applied by a force F = 20 hat(i) + 10 hat(j) Find the displacement of the block in 10 seconds.

A block of mass 70kg is kept on a rough horizontal surface (mu=0.4) . A person is trying to pull the block by applying a horizontal force, but the block is not moving. The net contact force exerted by the surface on the block is F , then:

Two blocks of mass 1 kg & 2 kg are hanged from a light pulley and resting on a horizontal surface. A time varying force F = 4t N is acting on pulley in the direction shown . Time after which block will break off the surface will be -

Two blocks of masses m and 2m are placed on a smooth horizontal surface as shown in the figure. Find the acceleration of each block and normal reaction between two blocks if a horizontal force F_(0) is applied on (a) m and (b) 2m

AAKASH INSTITUTE-WORK, ENERGY AND POWER-EXERCISE
  1. A particle moves from point P(1,2,3) to point Q(2,1,4) under the actio...

    Text Solution

    |

  2. Which of the following vector is perpendiuclar to the vector vecA=2hat...

    Text Solution

    |

  3. A block of mass 2 kg is plased on a smooth horizontal surface. Two for...

    Text Solution

    |

  4. A position dependent force F ia acting on a particle and its force-pos...

    Text Solution

    |

  5. A man of mass 50 kg is standing in an elevator. If elevator is moving ...

    Text Solution

    |

  6. A particle moves along x - axis under the action of a position depende...

    Text Solution

    |

  7. What should be the angel between the direction of force and displaceme...

    Text Solution

    |

  8. A body constrained to move along y-axis is subjected to a constant for...

    Text Solution

    |

  9. A cubical vessel of height 1 m is full of water. What is the workdone ...

    Text Solution

    |

  10. A person pulls a bucket of water from a well of depth h. if the mass ...

    Text Solution

    |

  11. Force constants K(1) and K(2) of two springs are in the ratio 5:4. The...

    Text Solution

    |

  12. Two springs have their force constants in the ratio of 3:4. Both the s...

    Text Solution

    |

  13. A block of mass m is released on the top of a smooth inclined plane of...

    Text Solution

    |

  14. A particle of mass 3 kg is moving along x - axis and its position at t...

    Text Solution

    |

  15. A force vecF=(2hati+hatj+hatk)N is acting on a particle moving with co...

    Text Solution

    |

  16. Potential energy of a particle at position x is given by U=x^(2)-5x. W...

    Text Solution

    |

  17. A block of mass 4 kg is pulled along a smooth inclined plane of inclin...

    Text Solution

    |

  18. A stone is tied to one end of a light inexensible string of length l a...

    Text Solution

    |

  19. From a waterfall, water is falling down at the rate of 100kg / s on th...

    Text Solution

    |

  20. A body is being moved from rest along a straight line by a machine del...

    Text Solution

    |