# A Body of Mass 5 Kg is Moving with a Velocity of 10 M/S. a Force is Applied to It So that in 25 Seconds, It Attains a Velocity of 35 M/S. Calculate the Value of the Force Applied. - Science

Short Note

A body of mass 5 kg is moving with a velocity of 10 m/s. A force is applied to it so that in 25 seconds, it attains a velocity of 35 m/s. Calculate the value of the force applied.

#### Solution

Here, mass, m = 5kg
Let us calculate the value of acceleration by using the first equation of motion,
Given that:
initial velocity, u = 10 m/s
final velocity, v = 35 m/s
time taken, t = 25 seconds
Putting these values in the equation, we get:
v = u + at
⇒ 35 = 10 + a × 25
⇒ 35 = 10 + 25a
⇒ 35 − 10 = 25a
⇒ 25 = 25a
⇒ a = 25/25
⇒ a = 1   "m/s"^2
Now, putting m = 5 kg and a = 1 m/s2 in equation we get,
Force = mass × acceleration
Force = m × a
Force = 5 × 1
Force = 5 N

Concept: Newton's Second Law of Motion
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#### APPEARS IN

Lakhmir Singh Science Class 9 Physics
Chapter 2 Force and Laws of Motion
Short Answers | Q 28 | Page 75