A car is initially travelling at a velocity of 36km/h. Suddenly the driver sees a dog crossing the road in front of the car. It takes 0.75s for the driver to react and start braking the car. The car then decelerates at 4m/s² for 2 s, during which the dog has crossed the road. Find the final velocity of the car, and how far does the car travel after the driver sees the dog?

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?

An electron moves with a constant horizontal velocity of 3.0 × 106 m/s and no initial vertical velocity as it enters a deflector inside a tv tube. the electron strikes the screen after traveling 26 cm horizontally and 19 cm vertically upward with no horizontal acceleration. what is the constant vertical acceleration provided by the deflector? (the effects of gravity can be ignored.)

Why does some plastic stick to your skin?