How much force is required to give a 3.5-kg object an acceleration of 4.6 m/sec??

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

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

What happens during the fall in september