A student proposes a design for an automobile crash barrier in which a 1200kg car moving at 20.0m/s crashes into a spring that slows the car to a stop. In your calculation, disregard friction and any deformation or crumping of the car.
A. calculate the initial kinetic energy of the car.B. how much work must be done by the spring to stop the car?
C. To avoid injuring the passengers, the acceleration of the car as it slows can be no more than 5.00g (where g is the acceleration of gravity). what happens to most humans at around 5g.
D. calculate the maximum acceleration in m/s^2
E. Calculate the maximum force which can be applied to the car
F. if the spring constant is 7200N/m, how much will the car compress the spring?
G. what disadvantages are there to this design.