Question

A sphere is accelerated upwards by cord whose breaking strength is four times its weight. The maximum acceleration with which the sphere can move up without breaking the cord is :

• A. $g$
• B. $3g$
• C. $2g$
• D. $4g$

Answer 1

Answer: (B)

$3g$

Here, the tension in the cord is given by\

T = mg + ma

4mg = mg + ma

$g=\frac{a}{3}$

a = 3g