1. At $20$ seconds the driver steps on the brake pedal so that the net force on the car is $2500N$ forward.

a. How much time $($After the $20$ seconds$)$ does the car take to stop?

 

b. $$How far does the car travel $($After the $20$ seconds$)$ until it reaches a stop? 

 

2. The man gets out of the car. Because the car is out of gas, he pushes backward on the car with a constant force of $500N.$

 

 $$ What is the acceleration of the car when the man is pushing on it$?$