Acceleration Question

[Chu]

A car travelling at 30mph accelerates at a rate of -10 miles per hour per second. How long does it

take to come to a stop? What is the car’s average speed during that time? How far does the car travel

during that time? (b) A car travelling at 60mph accelerates at the same rate. How far does it travel

before coming to a stop? How does this compare to your answer for part (a)?

 

Can someone please show me how to solve this. I know the answers, I just want to know how to perform this problem.

Thanks!

[mathematic]

Basic equation: v=v_0+at and solve for t. v=0 (stop), v_0=30, a= -10.  For the second question v_0=60.  To get distance traveled, integrate v(t) from time t=0 to time t=stop.

[Chu]

Thank you!