Deceleration can be caused by friction, muscle force or external forces (by running into a wall for example). N is the normal force! As smaller the coefficient as less resistance by frictional forces! ... A is the surface area of the body or body part exposed to the force.
Answers & Comments
Answer:
friction
Explanation:
Deceleration can be caused by friction, muscle force or external forces (by running into a wall for example). N is the normal force! As smaller the coefficient as less resistance by frictional forces! ... A is the surface area of the body or body part exposed to the force.