A cyclist going 5 m/s slows down to 3 m/s in 8 seconds. What is the cyclist
acceleration?

What are similarities and differences of reflection, refraction, diffraction and absorption?

The two required components for a generator

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?