Q. A force of $50\ dynes\ $ is acted on a body of mass $5\ g$ which is at rest for an interval of 3 seconds, then impulse is
A) $0.15 \times 10^{- 3}\ Ns$
B) $0.98 \times 10^{- 3}\ Ns$
C) $1.5\ \times 10^{- 3}Ns$
D) $2.5 \times 10^{- 3}\ Ns$
Explanation
(c) Impulse , $I = F \times \mathrm{\Delta}t = 50 \times 10^{- 5} \times 3 = 1.5 \times 10^{- 3}\ N - s$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.