Question

4.A body of 5 kgis moving with a velocity of 20m/s. If a force of 100N is applied on it for 10s in
the same direction as its velocity, what will now be the velocity of the body
a)200 m/s. b)220 m/s. c) 240m/s. d)260 m/s​

Answer 1

Answer:

option B is the answer

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Answer 2

Answer:

b)220 m/s

Explanation:

m = Mass = 5 kg

u = Initial Velocity = 20m/s

F = Force = 100N

t = Time = 10s

v = Final Velocity = ?

F = ma

⇒ a =  m/ F

⇒ a =  (100/5) m/s²

⇒ a = 20m/s²

 

From 1st equation of motion,

v = u + at

⇒ v = 20 + 20 × 10

⇒ v = 20 + 200

⇒ v = 220m/s