Question

A mass of 10 gm is suspended by a string and the entire system is falling with a uniform acceleration of $400 \mathrm {~cm} / \mathrm { sec } ^ { 2 }$ The tension in the string will be $\left( g = 980 \mathrm {~cm} / \mathrm { sec } ^ { 2 } \right)$

• A. 5,800 dyne
• B. 9,800 dyne
• C. 11,800 dyne
• D. 13,800 dyne

Answer 1

Answer: (A)

5,800 dyne

Answer 2

$T = m ( g - a )$ = 10(980 – 400) = 5800 dyne