Newton’s Second Law Section 3-1

Force and Acceleration The greater the force is that is applied to an object, F=

Force and Mass The acceleration of an object depends on its as well as the exerted on it Throw a baseball and a softball F=

Newton’s Second Law F = The net force acting on an object causes the object to in the direction of the force. Force will be labeled in Mass = kg Acceleration = m/s2

You are pushing a friend on a sled. You push with a force of 40 newtons. Your friend and the sled together have a mass of 80kg. What is the acceleration of your friend on the sled?

A tennis ball undergoes an acceleration of 5,500m/s2 A tennis ball undergoes an acceleration of 5,500m/s2. How much force would the tennis racket have to exert to give the ball this acceleration? The ball has a mass of .06kg.

Friction Force that What happens to a skate board after you give it a push? Why does it slow down and eventually stop? Would the type of surface make a difference?

Amount of Friction The amount of friction depends on two things.

Three types of Friction

Static Friction The friction Getting the object moving

Sliding Friction Force that Once you have the object moving, there is still friction.

Rolling Friction The friction between Put sand on the ice when your car is stuck. Usually much less than static or sliding friction.

Air Resistance Force that acts Crumpled paper VS Flat paper Surface Area Air Resistance depends on:

Terminal Velocity The that a falling object can reach. The point where the forces acting on the object are