Physics still don't get it
posted by Anonymous .
Given: g=9.81 m/s square.
The parachute on a race car that weighs 8042 N opens at the end of a quartermile run when the car is traveling 35 m/s. What net retarding force must be supplied by the parachute to stop the car in a distance of 1020 m? Answer in units of N.

Physics still don't get it 
Damon
m = weight in Newtons/ 9.81
Change in kinetic energy = average force * distance.
The change in KE is all the KE, since it stopped.
(1/2) m v^2 at the start = F * 1020
So F = (1/2) m v^2 / 1020
Respond to this Question
Similar Questions

Physics
Given: g=9.81 m/s square. The parachute on a race car that weighs 8042 N opens at the end of a quartermile run when the car is traveling 35 m/s. What net retarding force must be supplied by the parachute to stop the car in a distance … 
Physics
1)A car of mass 1330 kg is traveling at 28.0 m/s. The driver applies the brakes to bring the car to rest over a distance of 79.0 m. Calculate the retarding force acting on the car. I don't get it. What is retarding force? 
MELODY
The parachute on a race car of weight 8850 N opens at the end of a quartermile run when the car is traveling at 31 m/s. What total retarding force must be supplied by the parachute to stop the car in a distance of 1000 m? 
Physics
A car weighs 15000N and is traveling along a highway at 27 m/s. If the driver immediately applies his brakes and the car comes to rest in 85 m, what net force acts on the car during its acceleration? 
Physics
The parachute on a race car that weighs 8036 N opens at the end of a quartermile run when the car is traveling 39 m/s. The acceleration of gravity is 9.81 m/s2 . What net retarding force must be supplied by the parachute to stop the … 
physics
An 82.0 kg skydiver jumps out of a balloon at an altitude of 1 500 m and opens the parachute at an altitude of 195 m. (a) Assuming that the total retarding force on the diver is constant at 55.0 N with the parachute closed and constant … 
physics help please!
A race car is one lap behind the lead race car when the lead car has 57 laps to go in a race. If the speed of the lead car is 66.2 m/s, what must be the average speed of the second car to catch the lead car just before the end of the … 
Physics
The parachute on a race car of weight 8,810 N opens at the end of a quartermile run when the car is traveling at 34 m/s. What total retarding force must be supplied by the parachute to stop the car in a distance of 1,100 m? 
AP Physics
A car does 8.0 ✕ 104 J of work in traveling 2.7 km at constant speed. What was the average retarding force (from all sources) acting on the car? 
physics
In a quartermile drag race, two cars start simultaneously from rest, and each accelerates at a constant rate until it either reaches its maximum speed or crosses the finish line. Car A has an acceleration of 11.0 m/s2 and a maximum …