Question

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

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

Answer 1

The correct option is D $4g$

For maximum acceleration,maximum force should be acting on the sphere.

So,max. acceleration will be $\frac{(5mg-mg)}{m}=4g$.