Question

A mechanic unscrew a nut by applying a force of 140 N with a spanner of length 40cm.What should be the length of the spanner if a force of 40 N is applied to unscrew the same nut?

Answer 1

Answer:

Explanation:

Moment of force =force ×perpendicular distance

=5×10

=50NCm

Answer 2

Answer:

1.4m

Explanation:

Force F1=140N

lengthL1=40 cm=40×10^-2m

Force F2=40N

lengthL2=?

to find:F1×L1=F2×L2

length of the spanner L2=F1×L1/F2

L2=140×40×10^-2/40

= 140×10^-2

lengthL2=1.4m

thus the answer completed