It is very difficult to generate simple harmonic motion in a real world environment. Explain why this is the case. I REALLY NEED HELP

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

Asap i'm in class rn a 1,000-kg car is traveling 20 m/s on a flat stretch of road. it gets to a hill and coasts uphill until it stops. how high up the hill does the car travel? givens: equation: 1/2mv2initial=mghfinal solve for h. plug & chug, label.

Anika asks eva to roll a basketball and then a bowling ball to her. which requires more force to roll, and why?