Home
Class 8
PHYSICS
A system of pulleys is used to lift a lo...

A system of pulleys is used to lift a load of 1000 `kg_(wt)`. If the efficiency of the pulley system is 80% and velocity ratio is 20, find the effort required to lift the load.

Text Solution

Verified by Experts

Use, efficiency = `(M.A.)/(V.R.) xx 100`
Substitute
MA = ?
`80=(MA)/(20)xx100 implies MA=(80)/(5)=16`
`MA= ("load")/("effort")`
`implies "effort "=(1000)/(16)` = 62.5 kgwt
Promotional Banner

Topper's Solved these Questions

  • DYNAMICS

    PEARSON IIT JEE FOUNDATION|Exercise CONCEPT APPLICATION(LEVEL 2)|19 Videos

  • CHEMICAL EFFECTS OF ELECTRIC CURRENT

    PEARSON IIT JEE FOUNDATION|Exercise COMPETITION CORNER (MCQ)|48 Videos

  • ELECTRICITY

    PEARSON IIT JEE FOUNDATION|Exercise CONCEPT APPLICATION (Level 3)|10 Videos

Similar Questions

Explore conceptually related problems

What is the velocity ratio of the two-pulley system shown?

Write down the relation between the load and the effort of the pulley system.

What is the velocity ratio of the single-pulley system shown?

An inclined plane of length 2 m is used to load Maruti cars into a carrier truck. If the body of the truck is at a height of 1 m from the ground, find the effort required to load a car using the inclined plane. The unladen weight of a Maruti car is 600 kgwt (Take g = 10 m s^(-2) )

An inclined plane of length 2 m is used to lift a load of 100 kg_(wt) . The force required to lift the load is 20 kg_(wt) . The height through which the load is lifted is ______ m

If an inclined plane of length 2 m is used to lift a load of 20 N to a height of 1 m, find the effort required to lift the load to that heiht using inclined plane.

If the two-pulley system is 75% efficient, what is its mechanical advantage?

If the fixed pulley of a two-pulley system were removed, would the velocity ratio be greater, the same or less?