Question

While traveling along a highway a driver slows from 24 m/s to 15 m/s in 12 seconds. what is the automobile's acceleration? (remember that a negative value indicates a slowing down or deceleration.)?

Answer 1

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Answer 2

Given : -

• a cart with a mass of 12 kg

• traveling at 15 m/s .

• slows down to 11 m/s in 12 seconds.

To Find : -

• What would be the acceleration of the cart?

• What would be the net force on the cart during this time?

Solution : -

we have :

What would be the acceleration of the cart?

v = u + at

Substitute all values :

11 = 15 + a × 12

- 12a = 15 - 11

- 12a = 4

a = - 4 / 12

a = 0.33

What would be the net force on the cart during this time?

We have :

F = ma

F = 12 × 1/3

F =12 /3

F = 4 N