fig 4 represents a block-and-tackle pulley system on which an effort of W newtons supports a load of 120.0N if the efficiency of the system is 40% then the value of W is

olyezema

4 years ago

£=M.A×100/V.R
V.R= the no of pulleys in the diagram which is 6
40=M.A×100/6
M.A=6×40/100
M.a=2.4
M.A=L/E
E=L/M.A
E=120/2.4=50-option c

enoky_fy

3 years ago

No diagram shown

emmytoonz40

5 months ago

correct- C

Ibjat

1 year ago

the diagram wasn't showing

Myschool Abby

3 years ago

Kindly click on view explanation to see attached diagram.

Erioluwaa

5 years ago

efficiency =M.A/V.R x 100/1
M.A=Effort/Load
so
Efficiency=Effort/load/V.R X100/1
SOLVE IT......ANSWER=288.0N