Work, Force and Motion.

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Presentation transcript:

Work, Force and Motion

Work and Forces

Force a push or a pull on an object push = away; pull = toward has size and direction changes speed and direction Force (F) is measured in newtons (N)

÷ F D W X Work - a force moving an object over a distance. Work is done ONLY if an object moves in the direction of the force Work (W) is measured in joules (J) Force (F) is measured in newtons (N) W F D ÷ X

Do all forces result in motion? Can you see all forces acting on an object? Can more than one force act on an object at the same time?

Net force - the combination of all the forces acting on an object When forces on an object produce a net force of 0 N, the forces are balanced and the object does not move When the net force on an object is not 0 N, the forces on the object are unbalanced Unbalanced forces produce a change in motion of an object

Balanced Forces Balanced Forces- When the forces on an object produce a net force 0N Will not cause a change in motion of a moving object Does not cause a non-moving object to move

Unbalanced Forces When the net force on a object is not 0N the forces are unbalanced Produce a change in motion

Forces in Different Directions

The forces acting on the object can be balanced or unbalanced If they are unbalanced their will a change in the objects motion. How will this objects speed change? Find the Net force acting on the object. 10 N 5 N

Find the Net force acting on the object.

Find the Net force acting on the object. ________________ Are the forces balanced or unbalanced? 10 N 12 N