Question

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Answer 1

Question :

Velocity of a body weighing 1kg chances from 5 m/s to 25 m/s in 5 s. Find Force Acting

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GiveN :

• Mass of body (m) = 1 kg
• Initial velocity (u) = 5 m/s
• Final velocity (v) = 25 m/s
• Time interval (t) = 5 s

To FinD :

• Force Acting

SolutioN :

For calculating force acting, we have to firstly find out acceleration of the body. Use 1st equation of motion :

⇒v = u + at

⇒25 = 5 + a * 5

⇒25 = 5 + 5a

⇒5a = 25 - 5

⇒5a = 20

⇒a = 20/5

⇒a = 4

∴ Acceleration of body is 4 m/s²

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Now, use formula for force

⇒F = m * a

⇒F = 1 * 4

⇒F = 4

∴ Force acting is 4 N

Answer 2

Answer:

4 Newtons

Explanation:

Given :

• Mass of the body = m = 1 kg

• Initial velocity = u = 5 m/s

• Final velocity = v = 25 m/s

• Time taken = t = 5 seconds

To find :

• Force acting on the body

Force = Mass × Acceleration

Acceleration = (final velocity - Initial velocity) / time

Acceleration = (v-u) / t

Acceleration = (25-5)/5

Acceleration = 20/5

Acceleration = 4 m/s²

Force = 1×4

Force = 4 Newtons

The force acting on the body is equal to 4 Newtons