Home
Class 11
PHYSICS
A block rests on a rough inclined plan...

A block rests on a rough inclined plane as shown in Fig. 7.93 . A horizontal force is applied to it . (a) Find out the force of reaction .
(b) Can the force of friction be zero ? If yes , when ? (c) Assuming that , friction is not zero , find it magnitude and the direction of its limiting value .

Text Solution

Verified by Experts

The correct Answer is:
(a) R = mg cos `theta` + F sin `theta`
(b) Yes , if mg sin `theta` = F cos `theta` ,
(c) f = `mu` R = `mu ` ( mg cos theta + F sin `theta`) ; up the plane if the body has tendency to slide down and down the plane if the body has tendency to move up .

(a) `N = "mg cos" theta + F "sin" theta`
(c) f = `mu N`
Promotional Banner

Topper's Solved these Questions

  • FRICTION AND CIRCULAR MOTION

    GRB PUBLICATION|Exercise OBJECTIVE QUESTIONS ( only one choice is correct )|80 Videos

  • FRICTION AND CIRCULAR MOTION

    GRB PUBLICATION|Exercise More than one correct|18 Videos

  • FRICTION AND CIRCULAR MOTION

    GRB PUBLICATION|Exercise Comprehension type|11 Videos

  • FORCE AND NEWTONS LAWS OF MOTION

    GRB PUBLICATION|Exercise Comprehension|12 Videos

  • MOTION IN A STRAIGHT LINE

    GRB PUBLICATION|Exercise Comprehension type Queston|14 Videos

Similar Questions

Explore conceptually related problems

A block rest on a rough inclined plane as shown in fig. A horizontal force F is applied to it (a) Find out the force of reaction, (b) Can the force of friction be zero if yes when? And (c) Assuming that fricition is not zero find its magnitude and direction of its limiting value.

A block is placed on a smooth inclined plane as shown . For what value of horizontal force F, the block will remain at rest ?

A block rests on a rough inclined plane as shown in figure. A horizontal force F is applied to it- (a) Reaction on the block is Fsintheta+mgcostheta (b) Frictional force is zero when Fcostheta=mgsintheta (c) The value of limiting friction in mu(mgsintheta+Fcostheta) (d)The value of limiting friction is mu(mgsintheta-Fcostheta)

A block rests on a fixed rough inclined place and a horizontal force F is applied to it, as shown in the figure. Which of the following statements are correct? (A) Normal reaction on the block is Fsintheta+mgcostheta (B) The friction force is zero when Fcostheta=mgsintheta (C) The value of limiting friction is mu(mgsintheta+Fcostheta) (D) The value of limiting friction is mu(mgsintheta-Fcostheta)

A block of mass 3kg is at rest on a rough inclined plan as shown in the Figure. The magnitude of net force exerted by the surface on the block will be

A block rests on a rough inclined plane making an angle of 30° with the horizontal. The coefficient of static friction between the block and inclined plane is 0.8. If the frictional force on the block is 10 N, the mass of the block is

A block of mass 2kg rests on a rough inclined plane making an angle of 30^@ with the horizontal. The coefficient of static friction between the block and the plane is 0.7. The frictional force on the block is

A triangular block of mass m rests on a fixed rough inclined plane having friction coefficient mu with the block. A horizontal forces F is applied to it as shown in figure below, then the correct statements is:

A block rests on a rough inclined plane making an angle of 30^@ with the horizontal. The coefficient of static friction between the block and the plane is 0.8. If the frictional force on the block is 10N, the mass of the block (in kg) is

GRB PUBLICATION-FRICTION AND CIRCULAR MOTION -Problem For Practice
  1. A rock-climber (49 kg) is managing to be at rest between two vertical ...

    Text Solution

    |

  2. The three flat blocks in the figure are positioned on the 30 ^(@) in...

    Text Solution

    |

  3. In the Fig. 7.85 shown a constant force is applied on the lower block ...

    Text Solution

    |

  4. A 10kg block rests on a 5kg bracket as shown in figureThe 5kg breaket ...

    Text Solution

    |

  5. A block of mass 0.5 kg rests on a wedge of mass 2 kg as in Fig. 7.87 ....

    Text Solution

    |

  6. A solide homogeneous cylinder of height h and base radius r is kept ve...

    Text Solution

    |

  7. In the Fig 7.89 shown , m(2) = 2.5 kg , h = 1.5 m , the system is rel...

    Text Solution

    |

  8. Figure-2.85 shows a block B of mass m, cart C of mass M, and the coeff...

    Text Solution

    |

  9. A block of mass 2.20 kg is accelerated across a rough surface by a r...

    Text Solution

    |

  10. A circular disc with a groove along its diameter is placed horizontall...

    Text Solution

    |

  11. A block rests on a rough inclined plane as shown in Fig. 7.93 . A ho...

    Text Solution

    |

  12. Find the acceleration a(1) , a(2) and a(3) of the three blocks shown i...

    Text Solution

    |

  13. A thin uniform copper rod of length l and mass m rotates uniformly wit...

    Text Solution

    |

  14. A smooth semicircular wire-track of radius R is fixed in a vertical pl...

    Text Solution

    |

  15. A circular table with smooth horizontal surface is rotating at an angu...

    Text Solution

    |

  16. A metal ring of mass m and radius R is placed on a smooth horizontal t...

    Text Solution

    |

  17. A particle describes a horizontal circle on the smooth inner surface o...

    Text Solution

    |

  18. Two blocks of mass m(1)=10kg and m(2)=5kg connected to each other by a...

    Text Solution

    |

  19. A piece of ics slides down a 45^(@) incline in twice the time it takes...

    Text Solution

    |

  20. A block slides down a rough inclined plane of slope angle theta with a...

    Text Solution

    |