a motor car reaches a velocity of 15m/s in 6s from rest on a perfect test track . what is the average acceleration​

In a system, when potential energy decreases, then entropy also decreases. true false

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

If an athlete runs once around a track, back to the starting line, her average velocity is zero. true or false?