A100 kg cart, initially at rest, rolls down a 20 m high frictionless hill. at the bottom, the cart stops after plowing 2.0 m into crash cushions. determine the average force of the crash cushions on the cart while stopping it.

they are non-matter

explanation:

they are non-matter. basically, any type of energy or any abstract concept is an example of something that does not matter. other examples include dreams, magnetism, radio, and hate

here we know that ball will drop down by total distance 3.2 m

so here we know that

now using kinematics

now in the same time it will cover horizontal distance of 0.75 m

so speed of the ball will be

show the wavelengths of a wave. show the crests of a wave.

it would be c. predictability