Answered

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If the brakes on a 1,600 kg car exert a stopping force of
-25,000 N and the car's velocity changes from 20 m/s to 0 m/s.
then how long does it take the car to stop?

Sagot :

asuwafohjames

The time it takes the car to stop is 1.28 seconds.

What is impulse

Impulse can be defined as the product of force and time.

To calculate the time it will take the car to stop. we apply the formula of impulse.

Formula:

  • Ft = m(v-u)............ Equation 1

Where:

  • F = Force on the car
  • m = mass of the car
  • v = final velocity
  • u = initial velocity.
  • t = time

Make t the subject of the equation

  • t = m(v-u)/F.............. Equation 2

From the question,

Given:

  • F = -25000 N
  • v = 0 m/s
  • u = 20 m/s
  • m = 1600 kg

Substitute these values into equation 2

  • t = 1600(0-20)/-25000
  • t = -3200/-2500
  • t = 1.28 seconds.

Hence, the time it takes the car to stop is 1.28 seconds.

Learn more about impulse of a force here: https://brainly.com/question/20586658

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