English

Name the type of single pulley that has an ideal mechanical advantage equal to 2. Draw a labelled diagram of the pulley mentioned by you. - Physics

Advertisements
Advertisements

Question

Name the type of single pulley that has an ideal mechanical advantage equal to 2. Draw a labelled diagram of the pulley mentioned by you.

Answer in Brief
Diagram
Advertisements

Solution

In an ideal scenario, a single moving pulley serves as a force multiplier.

L = T + T = 2T

E = T

M.A = `"Load L"/"Effort E"`

= `(2T)/T = 2`

In an ideal scenario, lifting a load with a single moving pulley requires exerting effort equal to half of the burden. 

shaalaa.com
  Is there an error in this question or solution?
Chapter 3: Machines - EXERCISE - 3 (B) [Page 66]

APPEARS IN

Selina Physics [English] Class 10 ICSE
Chapter 3 Machines
EXERCISE - 3 (B) | Q 7. | Page 66

RELATED QUESTIONS

A boy uses a single fixed pulley to lift a load of 50 kgf to some height. Another boy uses a single movable pulley to lift the same load to the same height. Compare the effort applied by them. Give a reason to support your answer.


Is the above pulley system an ideal machine or not?


The mechanical advantage of an actual pulley is less than one. Give a reason. What is the justification for using the pulley then?


Answer the following in detail.

How does a pulley make work simpler? 


Define the following term in reference to a gear system for Driven gear ?


Define the following term in reference to a gear system for Gain in torque ?


The diagram below shows a pulley arrangement.

(i) In the diagram, mark the direction of the forces due to tension, acting on the pulley P.

(ii) What is the purpose of the pulley Q?

(iii) If the tension is T newton, deduce the relation between T and E.

(iv) Calculate the velocity ratio of the arrangement.

(v) Assuming that the efficiency of the system is 100%, what is the mechanical advantage?

(vi) Calculate the value of E


Give a reason for the following:

In a single fixed pulley, the velocity ratio is always more than the mechanical advantage.


Fig shown a block and tackles system of pulleys used to lift a load.

(i) How many strands of tackle are supporting the load?

(ii) Draw arrows to represent tension in each stand.

(iii) What is the mechanical advantage of the system?

(iv) When load is pulled up by a distance 1 m how far does the effort end move?


State two reasons, why the efficiency of a pulley system is not 100 percent?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×