Laws Of Motion Question 192
Question: At a place where the acceleration due to gravity is $ 10m{{\sec }^{-2}} $ a force of 5 kg-wt acts on a body of mass 10 kg initially at rest. The velocity of the body after 4 second is [EAMCET 1981]
Options:
A)$ 5m{{\sec }^{-1}} $
B) $ 10m{{\sec }^{-1}} $
C) $ 20m{{\sec }^{-1}} $
D) $ 50m{{\sec }^{-1}} $
Show Answer
Answer:
Correct Answer: C
Solution:
Acceleration $ =\frac{Force}{Mass}=\frac{50\ N}{10\ kg}=5\ m/s^{2} $ From $ v=u+at=0+5\times 4=20\ m/s $
