The velocity ratio and efficiency of a system of pulleys are 6 and 80% respectively....

WAEC 1996

The velocity ratio and efficiency of a system of pulleys are 6 and 80% respectively. How much effort is required to lift a load of mass 120kg with this system? (g=10ms^-2)

A. 25N
B. 90N
C. 96N
D. 250N
E. 960N

JAMB CBT 2025 - Candidates, Schools, Centres, Resellers - Get Ready!

JAMB CBT Mobile App 2025 - Free Download

WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 127076

Correct Answer: Option D

Explanation

Efficiency =

M.A/V.R

x 100%

80/100

120 x 10/E

E = 250N

Previous Next

Go back to Phy classroom

Report an Error Ask A Question Download App

Contributions ({{ comment_count }})

Please wait...

{{ settings.no_comment_msg ? settings.no_comment_msg : 'There are no comments' }}

Quick Questions

Hii, Waec would be starting on the 25th animal husbandry, in which I’m offering but I’m also writing Jamb on... Answer this

1 Answers · 1 hour ago
Part of germinating plant that bring shoots? Answer this

1 Answers · Biology · 2 days ago
which app can I join biochemistry online? Answer this

1 Answers · Biological Science · 3 days ago

The velocity ratio and efficiency of a system of pulleys are 6 and 80% respectively....

Correct Answer: Option D

Explanation

Contributions ({{ comment_count }})

Please wait...

Modal title

Report

Block User

{{ feedback_modal_data.title }}

Quick Questions

Post your Contribution

Sign In