A pulley system can lift a load of 1200 N by an effort of 250 N. If the resistance due to the weight of movable parts and friction is 300 N.Find the total number of pulleys in the system.

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C
6

Given: load = 1200 N, effort = 250 N, and friction = 300 N.
MA $= \frac{L o a d}{E f f o r t} = \frac{1200}{250} = 4.8$
Velocity ratio, VR = Ideal mechanical advantage
$= \frac{T o t a l r e s i s t a n c e o v e r c o m e}{E f f o r t}$
$= \frac{U s e f u l l o a d + o t h e r f o r c e}{E f f o r t}$
$= \frac{1200 + 300}{250} = \frac{1500}{250} = 6$
Total number of pulleys = VR = 6

Suggest Corrections

Similar questions

A pulley system has 5 pulleys in all and is 90% efficient. If the effort required to lift a load is 1000 N, find the resistance due to the movable parts of machine and friction.

In a single movable pulley system, a load of 225 kgf is lifted by an effort of 75 kgf. Velocity ratio of the single movable pulley is 4. Find the percentage efficiency of the system.

Q. An ideal pulley system can lift a load of 1500 N by an effort of 300 N. The velocity ratio of the system is .

A movable pulley system consists of three movable pulleys and one fixed pulley. Calculate the distance moved by the load when effort moves by 80cm

Q. If an ideal pulley system can lift a load of

2000 N

by an effort of

500 N

. Find its velocity ratio.

Join BYJU'S Learning Program

A pulley system can lift a load of 1200 N by an effort of 250 N. If the resistance due to the weight of movable parts and friction is 300 N.Find the total number of pulleys in the system.

The correct option is C 6 Given: load = 1200 N, effort = 250 N, and friction = 300 N. MA =LoadEffort=1200250=4.8 Velocity ratio, VR = Ideal mechanical advantage =Total resistance overcomeEffort =Useful load+other forceEffort =1200+300250=1500250=6 Total number of pulleys = VR = 6