An automobile having a mass of 1220 kg is driven into a brick wall in a safety test. The bumper behaves like a spring of constant 2.42 × 106 N/m and compresses 2.99 cm as the car is brought to rest. What was the speed of the car before im- pact, assuming no energy was lost during im- pact with the wall?
2 answers
Energy=1/2 k x^2 solve for energy
KE = EPE
1/2m v^2 = 1/2k x^2
Make sure x is in meters.
1/2m v^2 = 1/2k x^2
Make sure x is in meters.
1 answer