a car is rolling backward when its hits the gas . after 8.25 s , it is moving forward at 8.62 m/s , and is 12.9m to the right of its starting point . what was its starting velocity?

Two identical 82 mg dust particles very far apart (pee 0) are moving directly toward each other at a speed of 3698 m/s. the charge on each is-719 ? c. determine how close they will get to each other. let k = 9x109 n-m2/c2 & ignore gravity.

An object has a weight of 500 on earth what is the mass of this object

One object has a mass of 1 kg and another object has a mass of 3 kg. if the speeds are the same, which of the following is true about their kinetic energy?