Question

A 65 kg tricycle traveling at 50 m/s slows down to 25 m/s in 15 s as it approaches a road intersection. What is the impulse exerted on the vehicle?

Answer 1

The impulse is defined as:

`I=m(v_f-v_0)`

In this case we know that:

• The mass is 65 kg.

,

• The initial velocity is 50 m/s

,

• The final velocity is 25 m/s.

Plugging these values in the definition we have:

`\begin{gathered} I=(65)(25-50) \\ I=-1625 \end{gathered}`

Therefore, the impulse is -1625 kg*m/s