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.)?
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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
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