How much force is required to accelerate a 50 kg mass at 2 m/s2?

Aphysical change is a change in the size, shape,, or stafe of matter true or false

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

Students design a model roller-coaster track. they place a rubber ball at the highest point on the track and let it go. the ball rolls along the track pulled only by the force of gravity. eventually, it comes to a stop. which change to the design will result in the ball moving the greatest distance?