Question

A stone of mass $0.05 \,kg$ is thrown vertically upwards. What is the direction and magnitude of net force on the stone during its upward motion ?

• A. 0.49 N vertically upwards
• B. 0.49 N vertically downwards
• C. 0.98 N vertically downwards
• D. 9.8 N vertically downwards

Answer 1

Answer: (B)

0.49 N vertically downwards

Answer 2

Given, $m = 0.05\, kg$
We know that, net force acting on a stone,
$f_{g}=mg$
$= 0.05 \times (-9.8)=-0.40\,N$
$= 0.49 \,N$ vertically downwards