Posted by **kelly** on Saturday, April 9, 2011 at 8:48pm.

1.A 75 kg passenger in a van is wearing a seat belt whent he van moving at 15m/s, collides with a conrete wall. The front end of the van collapses 0.50 m as it comes to rest.

a) what was the paseenger's kinetic energy before the crash

b) What average force did the seat belt exert on the passengfer during the crash?

2. A 1400 kg car is accelerating up a hill. The hill is 150m long and the total rise of the hill is 6.0m. The car accelerates from a speed of 7.0m/s at the bottom to 15m/s at the top. If the average retarding force of friction is 700 N find the change in potential energy of the car, and the change in kinetic energy of the car.

## Answer This Question

## Related Questions

- Physics! - PLEASE HELP - A 75 kg passenger in a van is wearing a seat belt whent...
- physics - A 54.5-kg passenger in the back seat of a van is wearing a seat belt ...
- spanish - is this correct? ¿Adónde van algunos niños antes de ir a la escuela ...
- Van de graaf question - A moving belt in a van de graaf generator transfers ...
- physics homework! #92 - A small sphere is hung by a string from the ceiling of a...
- physics - an unloaded van has a acceleration of 5 m/s/s. a fully loaded van ...
- word problem!!! algebra - at noon, a cargo van crosses an intersection at 30 mph...
- MATH - To rent a van, a moving company charges $30.00 plus $0.50 per mile. You ...
- Physics - I am trying to calculate the distance and speed a van was travelling ...
- physics - A car traveling at 20 m/s stops in a distance of 50 m. Assume that the...

More Related Questions