Question

An object has a momentum of 100 kg m/s. A force is applied for 2-s and brings the object to astop. What average force is needed over these two seconds? (Hint: what impulse is needed?Figure that out then use the definition of Impulse to calculate the average force).O 50NQ 100 NO 50 kg m/sO 100 kg m/s

Answer 1

Given:

The initial momentum is

`p_i=100\text{ kg m/s}`

The final momentum is

`p_{f\text{ }}=0\text{ kg m/s}`

The time duration is t = 2 s

To find the average force.

Step-by-step explanation:

The average force can be calculated as

`F\text{ =}(|p_f-p_i|)/(t)`

On substituting the values, the average force will be

`\begin{gathered} F=\text{ }(|0-100|)/(2) \\ =50\text{ N} \end{gathered}`

Thus, the average force is 50 N