Question

A force acts on an object of mass $1.5kg$ at rest, for $0.5s$. After the force stops acting, the object travels a distance of $5m$ in $2s$.Hence, the magnitude of the force will be:

• A. $5N$
• B. $7.5N$
• C. $10N$
• D. $12.5N$

Answer 1

The correct option is B $7.5N$

F=ma=1.5a

a=$\frac{F}{1.5}$

u=at=0.5a

s=ut=$0.5\frac{F}{1.5}2=5$

F=$7.5N$