Physics, asked by aditya92755, 4 months ago

A body of mass 10 kg is moving with a velocity of 100 m/s. Find the force needed to stop it in 5 seconds.


Give correct answer.​

Answers

Answered by Yuseong
12

Answer:

-200 N

Explanation:

As per the provided information in the given question, we have :

  • Mass of the body (m) = 10 kg
  • Initial velocity (u) = 100 m/s
  • Time taken (t) = 5 seconds
  • Final velocity (v) = 0 (As it stops)

We are asked to calculate the force need to stop it.

In order to calculate force, we need to calculate the acceleration first.As we know that,

→ a =  \sf \dfrac{v - u}{t}

  • a denotes acceleration
  • v denotes final velocity
  • u denotes initial velocity
  • t denotes time

→ a =  \sf \dfrac{0-100 }{5}

→ a =  \sf \dfrac{-100 }{5}

→ a =  \sf -20 \; m/s^2

Therefore, the acceleration is  \bf -20 \; m/s^2 .

Now, finding force applied.

★ F = ma

  • F denotes force
  • m denotes mass
  • a denotes acceleration

→ F = 10 × (-20) N

F = -200 N

Therefore, force needed to stop it is -200N. Negative sign implies that it should be applied in the opposite direction.

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