Physics
Can anyone help with which formula I should use to solve this:
During a head on car crash, the car is designed to slow down as its front end crumples. If a person can survive an acceleration of 33 m/s how far must the front end crumple if the car was initially traveling at 28 m/s?
asked by
Lynn

v = vi  33 t
v = 0 at stop
so
0 = 28  33 t
t = .848 seconds
distance = vi t (1/2)(33) t^2
d = 28(.848)  16.5 (.848)^2
= 23.8  11.9
= 11.9 meters (very long car)posted by Damon
Respond to this Question
Similar Questions

Physics
During a head on car crash, the car is designed to slow down as its front end crumples. If a person can survive an acceleration of 33 m/s how far must the front end crumple if the car was initially traveling at 28 m/s? 
8th grade science
Please show me how to solve this problem. A person wearing a shoulder harness can survive a car crash if the acceleration is less that 300 m/s2. How far must the front end collapse if it crashes while going 101 km/hr? Thanks. 
Physics
A person who is properly constrained by an overtheshoulder seat belt has a good chance of surviving a car collision if the deceleration does not exceed about 30 "'s". Assuming uniform deceleration of this value, calculate the 
College Physics
A person who is properly constrained by an overthe shoulder seat belt has a good chance of surviving a car collision if the deceleration does not exceed about 30 "g"s (1.0 g= 9.8m/s^2) Assumind uniform deceleration of this calue 
science
A car traveling about 50km/h collides headon with something solid. The car crumples, slows down and stops. Use the law of inertia to explain why a crash dummy not restrained by a seat belt in the car slams into the steering 
physics
Seat belts and air bags save lives by reducing the forces exerted on the driver and passengers in an automobile collision. Cars are designed with a "crumple zone" in the front of the car. In the event of an impact, the passenger 
Physics
The front 1.20 m of a 1550 kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision. (a) If a car traveling 26.0 m/s stops uniformly in 1.20 m, how long does the collision last? cannot_evaluate s 
physics
How would I find the acceleration of a car if it traveled 1.5 meters in one second? If it is accelerating at a constant rate with zero initial velocity, then use the formula X = (1/2) a t^2 and solve for the acceleration, a. X = 
physics
The front 1.20 m of a 1,350kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision. (a) If a car traveling 21.0 m/s stops uniformly in 1.20 m, how long does the collision last? s (b) What is the 
Physics
The front 1.20 m of a 1,350kg car is designed as a "crumple zone" that collapses to absorb the shock of a collision. (a) If a car traveling 22.0 m/s stops uniformly in 1.20 m, how long does the collision last? s (b) What is the