Forces Inclined Planes What force pushes an object

Forces Inclined Planes What force pushes an object down an inclined plane?

Forces Inclined Planes A cart slides down a frictionless ramp as shown below. Which of the free-body diagrams below best represents the forces on the cart?

Forces Inclined Planes 1. The steeper the incline the more force is needed to push the 1. object up it 2. The more massive the object the more force necessary to push it up the incline

Forces Inclined Planes The steeper the incline the more of the skiers weight pushes down the incline *W sin = mg sin increases

Forces Inclined Planes Normal Force = force perpendicular to surface When surface is horizontal the normal force equals the weight. FN FN = w cos w q When surface is inclined the perpendicular direction is NOT vertical so the normal force is only a component of the object’s weight.

Forces Inclined Planes FN f w cos w w sin // link

Forces Inclined Planes

Forces Inclined Planes f FN w cos *W sin pushes it down w w sin the incline*

Forces Summary: 1. 2. 3. 4. Inclined Planes Part of the weight ( mg sin ) pushes the object down the incline. Part of the weight (mg cos ) balances out the normal force. The frictional force acts opposite the motion To push something up an incline the minimum force necessary is mg cos

Forces Inclined Planes If the mass of the block is 10 kg, and the coefficient of kinetic friction is. 2, find the acceleration of the block down the incline.

Forces Inclined Planes

Forces Inclined Planes