As part of a safety investigation, two 1400 kg cars traveling at 20 m/s are crashed into different barriers. find the average forces exerted on (a) the car that hits a line of water barrels and takes 1.5 s to stop, and (b) the car that hits a concrete barrier and takes 0.10 s to stop.

(a) 18667N

(b)280000N

Explanation:

The momentum of both car prior to collision:

M = mv = 1400*20 = 28000 kgm/s

After colliding, the average force exerting on either car to kill this momentum is

(a)

(b)

powerful computers now, not then

adding a(n) to an electric circuit would increase the magnetic field around a wire;

b. solenoid

a solenoid is a type of electromagnet whose purpose is to generate a controlled magnetic field.

if the purpose of the solenoid is instead to impede changes in the electric current, a solenoid can be more specifically classified as an inductor rather than an electromagnet.