Question

Multiple Choice: A car with a mass of 825 kg moves along the roadway at aspeed of 15 m/s to the east. What impulse is required to decrease the speed of theboat to 10 m/s east?

Answer 1

Given:

The mass of the car is m = 825 kg

The intial speed of the car is

`v_i\text{ = 15 m/s}`

towards east.

The final speed of the car is

`v_f\text{ = 10 m/s}`

To find the impulse of the car.

Step-by-step explanation:

The impulse can be calculated by the formula

`Impulse\text{ = mv}_f-mv_i`

On substituting the values, the impulse will be

`\begin{gathered} Impulse\text{ = \lparen825}*10\text{\rparen-\lparen825}*15\text{\rparen} \\ =\text{ -4125 kg m/s} \end{gathered}`

The impulse will be 4125 kg m/s due