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The brakes on a 15,680 N car exert a stopping force of 640 N.

The car's velocity changes from 20.0 m/s to O m/s. What is

the car's initial momentum?

Respuesta :

Answer:

initial momentum = 32000 kg.m/s

Explanation:

given data

car weight = 15,680 N

force = 640 N

velocity = 20.0 m/s

solution

we get here initial momentum that is express as

initial momentum = mass × velocity   ................1

here mass = weight ÷ gravitational force

mass = [tex]\frac{15680}{9.8}[/tex]

mass = 1600 kg

so put value in equation 1 we get

initial momentum = 1600 kg × 20 m/s

initial momentum = 32000 kg.m/s

Ritmeks

The car's initial momentum is 32,000 m/s

The first step is to calculate the mass

mass= force/acceleration

= 15680/9.8

= 1600

The next step is to calculate the car's initial momentum

= mass × velocity

= 1600 × 20

= 32,000

Hence the car's initial velocity is 32,000 m/s

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