Question

The force required to open a nut using a spanner of length 90 cm is 50 N. The force required if the spanner is 50 cm long is.

• A. 60 N
• B. 90 N
• C. 50 N
• D. 100 N

Answer 1

The correct option is B 90 N

Moment required to open nut will always be same.

So, $F_1{d}_1=F_2{d}_2$

$\Rightarrow 50\times 90=F_2\times 50$

$\Rightarrow F_2=90N$