An angry mob lynches a phsical teacher after receiving their grades. they throw the physics teacher off a tall building . they throw the physics teacher straight down with a velocity of 20m/s. the teacher falls for 30 seconds before landing on a stack of empty card board boxes . how high was he thrown from?

Which car has the most kinetic energy? a. a car of mass 1000 kg with a speed of 3 m/s b. a car of mass 2000 kg with speed 7 m/s c. a car of mass 1000 kg with speed 7 m/s d. a car of mass 2000 kg with speed 3 m/s

James is trying to prove newton's 2nd law of motion. he tries to move four different objects with different masses, shapes, and sizes from point a to point b. the objects are a toy car, a car, a refrigerator, and a kitchen table. after some experimentation, he finds that force is dependent on the mass of the object, rather than it's size or shape. the object that takes the most force to move is the

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