Home
Class 6
PHYSICS
Ram used a crowbar of length 1.5 m as a ...

Ram used a crowbar of length 1.5 m as a `II^(nd)` order lever to displace a heavy sphere placed on the horizonat surface. If the crowbar applies a force of 240 N on the sphere at a distance of 100 cm from effort, then find the minimum effort applied by Ram to displace it.

Text Solution

Verified by Experts

The correct Answer is:
80 N
Crowbar act as IInd order lever as shown below:

To apply minimum effort should be applied at the top of the crowbar as shown in the figure, then
Effort arm = Length of the crowbar = 1.5 m = 150 cm
Load arm = 150 cm-100 cm = 50 cm
`MA=("Effort arm")/("Load arm")=(150)/(50)=3`
`E=(L)/(MA)=(240)/(3)=80`
Minimum effort = 80 N
Promotional Banner

Topper's Solved these Questions

  • THE MACHANISM OF MACHINES

    PEARSON IIT JEE FOUNDATION|Exercise CONCEPT APPLICATION|5 Videos

  • THE MACHANISM OF MACHINES

    PEARSON IIT JEE FOUNDATION|Exercise ASSESMENT TEST|12 Videos

  • THE MACHANISM OF MACHINES

    PEARSON IIT JEE FOUNDATION|Exercise VERY SHORT ANSWER TYPE QUSETIONS|20 Videos

  • THE ESSENCE OF ELECTRICITY

    PEARSON IIT JEE FOUNDATION|Exercise Crossword|1 Videos

  • THE MAGICAL MAGNETISM

    PEARSON IIT JEE FOUNDATION|Exercise ASSESSMENT TEST (Test 1)|11 Videos

Similar Questions

Explore conceptually related problems

To lift a piece of burning coal of mass 200 g, a cook uses a fire tong of length 30 cm. He applies the effort at a distance of 10 cm from its fulcrum. Find the effort applied by the cook. (g=10 ms^(-2))

A charge of 24 muC is given to a hollow metallic sphere of radius 0.2m. Find the potential (i) at the surface of sphere (ii) at a distance of 0.1 cm from the center of sphere.

A hollow metal sphere is charged with 0.4muC of charge and has a radius of 0.1 find the potential (i) at the surface (ii) inside the sphere (iii) at a distance of 0.6m from the centre. The sphere is placed in air.

A solid sphere of mass m and radius R is placed on a smooth horizontal surface. A sudden blow is given horizontally to the sphere at a height h = 4R//5 above the centre line. If I is the impulse of the blow then find (a) the minimum time after which the highest point B will touch the ground. (b) the displacement of the centre of mass during this internal.