A car crashes into a wall with an impulse of 40,000kg.m/s The collision took 2 seconds . How much force did the wall exert? 60,000 N 80,000 N 40,000 N 20,00 ON

Impulse is defined as the change in momentum of an object when a force is applied over a period of time. The formula for impulse is given by:<br /><br />\[ \text{Impulse} = \text{Force} \times \text{Time} \]<br /><br />Given that the impulse is \( 40,000 \, \text{kg} \cdot \text{m/s} \) and the time is \( 2 \, \text{seconds} \), we can rearrange the formula to solve for the force:<br /><br />\[ \text{Force} = \frac{\text{Impulse}}{\text{Time}} \]<br /><br />Substituting the given values:<br /><br />\[ \text{Force} = \frac{40,000 \, \text{kg} \cdot \text{m/s}}{2 \, \text{s}} = 20,000 \, \text{N} \]<br /><br />Therefore, the force exerted by the wall is \( 20,000 \, \text{N} \).