William wanghomework #33 regents review (3)0989assignment mode : open (time on task) 9 of 25 listenduring a collision, an 84-kilogram driver of a car moving at 24 meters per second is brought to rest by an inflating air bag in 1.2 seconds. the magnitude of the force exerted on the driver by the air bag is approximately7.0 × 101 n8.2 × 102 n1.7 × 103 n2.0 × 103 ntime on question: 00: 02: 59

Explanation:

The impulse theorem states that the product between the force and the time interval of the collision is equal to the change in momentum:

where

F is the force

is the time interval

m is the mass

is the change in velocity

Here we have

m = 84 kg

So we can solve the equation to find the force:

thermal energy is the answer

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.