Question

A force of $100dyne$ acts on a mass of $5g$ for $10s$ . The velocity produced is

• A. $2cm{s}^{-1}$
• B. $20cm{s}^{-1}$
• C. $200cm{s}^{-1}$
• D. $2000cm{s}^{-1}$

Answer 1

Answer: (C)

Given,
$F=100dyne$
$m=5gram$
$t=10second$
Acceleration $a=\frac{F}{m}=\frac{100}{5}=20cm/s^2$
Now from equation of motion
$v=u+at$
$v=0+20\times 10$
$v=200cm/s$