Q. A force of 100 dyne acts a mass of 5 gram for 10 s. The velocity produced is
A) $2000{\ cms}^{- 1}$
B) $200{\ cms}^{- 1}$
C) $20\ {cms}^{- 1}$
D) $2{\ cms}^{- 1}$
Explanation
(b) From the formula
$F = ma$
$100 = 5a$
$\Longrightarrow \ \ a = 20\ {cms}^{- 2}
$from equation of motion
$v = u + at = 0 + 20 \times 10$
$v = 200\ {cms}^{- 1}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.