Question

A pair of scissors used to cut cloth has a handle of length 3cm. If the distance between the tip of the blades and he rivet is 12cm, find the MA. Also find the load it can overcome if the effort applied the handles is 15gf.​

Answer 1

Given:

length of a handle of a pair of scissors = 3cm

the distance between the tip of the blades and the rivet = 12cm

effort applied the handles = 15kg

To find:

1) MA =?

2) load =?

Step-by-step explanation:

1)

• The mechanical advantage ( MA ) of a pair of scissors is the ratio of the length of a handle of a pair of scissors & the distance between the tip of the blades and the rivet.

        $MA = \displaystyle \frac{3}{12}$

       MA = 0.25

• Hence, the mechanical advantage of a pair of scissors is 0.25.

2)

• The load handle by a pair of scissors is the product of the mechanical advantage of a pair of scissors &  the effort applied to the handles.

        load = MA × effort applied

                 = 0.25 × 15

        load = 3.75 kg

• Hence, the required load handled by a pair of scissors is 3.75 kg.