Answer :
The Final speed of the body is = 65 m/s
The values that are given in the question are,
Mass of body = 2.0 kg
Velocity of the body = 40 m/s
Force = 10 N
Time = 5.0 s
Firstly we need to calculate the momentum change of the body,
The formula for change in momentum,
⇒ Change in momentum = Force x Time
⇒ Change in momentum = 10 x 5.0
⇒ Change in momentum = 50 kg-m/s
Now we have to calculate the change in velocity,
⇒ Change in velocity = Change in momentum / Mass
⇒ Change in velocity = 50 / 2.0
⇒ Change in velocity = 25 m/s towards east
Now to calculate the final velocity
⇒ Final velocity = initial velocity + change in velocity
⇒ Final Velocity = 40 + 25 = 65 m/s
Therefore, the final speed of the body is = 65 m/s
To learn more about Speed and Momentum,
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