In order for you to jump a distance of 4 feet horizontally, you must exert a force of 200 N.
When you are standing on the ground, you have
no trouble doing this. If you are standing in a
canoe, however, and you need to jump 4 feet to
reach the pier, you will surely fall in the water
Why is it that you cannot jump 4 feet out of a
canoe when you can easily do this when on land?

You are driving to the grocery store at 20 m/s. you are 110m from an intersection when the traffic light turns red. assume that your reaction time is 0.50s and that your car brakes with constant acceleration. how far are you from the intersection when you begin to apply the brakes? what acceleration will bring you to rest right at the intersection? how long does it take you to stop after the light changes? the known values: vi=20m/s xi=110m t=.50s vf=0m/s xf=0m a=?