Your car is initially moving at 16.8 m/s when your hit the brakes and the car begins to slow down. The car has a mass of 621 kg and
the coefficient of friction between the tires and the road is 0.7.
What is the time needed to stop the car and how much ground
does it cover during this process?

What is the temperature in degrees celsius of a substance with a tempature of 49k

An atom that has gained or lost electrons is called an _

On a horizontal frictionless surface, a small block with mass 0.200 kg has a collision with a block of mass 0.400 kg. immediately after the collision, the 0.200 kg block is moving at 12.0 m/s in the direction 30° north of east and the 0.400 kg block is moving at 11.2 m/s in the direction 53.1° south of east. use coordinates where the +x-axis is east and the +y-axis is north.(a) what is the total kinetic energy of the two blocks after the collision (in ) what is the x-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your ) what is the y-component of the total momentum of the two blocks after the collision? (indicate the direction with the sign of your answer.)