a car of a mass 1100kg moves at 24m/s. What breaking force is needed to bring the car to a stop in 2.0s?

so i...

1100X24=26400/20.0=1320N?

Am i right?

if not please help:(

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a car of a mass 1100kg moves at 24m/s. What breaking force is needed to bring the car to a stop in 2.0s?

so i...

1100X24=26400/20.0=1320N?

Am i right?

if not please help:(

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## Answers (1)

final velocity = V = 0 and initial velocity = Vi = 24 m/sec

The deceleration, or negative_value acceleration will be:

a = (∆V) ⁄ (∆t) = (V − Vi) ⁄ 2

a = (0 − 24) ⁄ 2

a = -12 m/sec²

Stopping Force = m • a

Stopping Force = (1100 Kg) • (-12 m/sec²) = 13200 N