Which force resists motion between objects that are in contact

After studying acceleration, Amos explains what the gas pedal in the car is called an accelerator. What should Amos say in his explanation

What can cause acceleration

Henri wants to explain what is meant by mass. How should he describe the mass of his body

What two things must Stephanie measure to find the speed of a moving object

What force causes a boy jumping off a chair to move toward the Earth

Any moving abject will keep moving in the same direction at the same speed unless some force changes its direction or speed

For any action there is an equal and opposite reaction

Any object speeds up or slows down in proportion to the size of the force acting on it