Science
posted by Abby .
Moving at 20 m/s , a remote controlled car of mass 1000kg hits a pile of sand and comes to rest in 10 s. Find the average force that acted to stop the car.
The same car now hits a wall and comes to rest in 1s. Find the average force that acted to stop the car.
Use knowledge gained from this problem to explain why airbags generally reduce injuried during a car crash.
Force*time=mass*changevelocity
Force*time=mass*changevelocity
a) [1000* 20 ]/10 = 2000
b) [1000* 20 ]/1 = 20000
c) Would Airbags reduce injuries because they are a lot softer than a steering wheel. They also allow mote time for the head to hit the airbag which will reduce the force.
Respond to this Question
Similar Questions

Physics
Moving at 20 m/s , a remote controlled car of mass 1000kg hits a pile of sand and comes to rest in 10 s. Find the average force that acted to stop the car. The same car now hits a wall and comes to rest in 1s. Find the average force … 
Physics
A car is traveling at 95km/hr when it collides with a stone wall. The car comes to rest after the first 30 cm of the car is crushed.what was the average horizontal force acting on a 68.1 kg driver while the car came to rest? 
physics
A 1000 kg car in neutral gear slow from 15 m/s to a stop in 5.0 s due to the force of friction. A. What was the acceleration of the car. B. What was the carâ€™s initial momentum? 
Physics
A 4.00 103kg car has a speed of 9 m/s. The car then hits a tree. The tree doesn't move and the car comes to rest. (a) Find the change in kinetic energy of the car. . J (b) Find the amount of work done in pushing in the front of the … 
physics
A car of mass 1000kg moving with a velocity of 36km/h hits a wall and comes to rest in 5s.find the force and work done by the car on the wall. 
AP physics
A car is traveling at 60.0 mph when it collides with a stone wall. The car comes to rest after the first foot of the car is crushed. What was the average horizontal force acting on a 150lb driver while the car came to rest? 
Physics!
A car of mass 1298.7 kg is moving at a speed of 64.0 mph when it misses a curve in the road and hits a bridge piling. If the car comes to rest in 0.234 s, how much average power (in watts) is expended in this interval? 
Physics
A car of mass 1335.0 kg is moving at a speed of 60.4 mph when it misses a curve in the road and hits a bridge piling. If the car comes to rest in 0.214 s, how much average power (in watts) is expended in this interval? 
Science
A driver of a moving car at 20m/s finds a child on the road 50m ahead and stops the car 10m earlier to the child. If the mass of the car with driver is 1000kg, calculate the force exerted by the brakes of the car? 
Physics
A car X moving of mass 500kg accelerates at 1m/s2 when the force due to the engine is 600N. Starting from rest, a car of mass 1000kg accelerates steadily to 20m/s in 10 secs. What is the average power developed