What is force FORCE A push or pull
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What is force? FORCE = A push or pull that changes an object’s velocity A change in velocity = acceleration As a result, forces can cause objects to speed up, slow down, or change direction
What are the units force? UNIT: Newton (N) Measurement Distance Time Velocity Unit Meters (m) Seconds (s) m/s Acceleration Force m/s 2 Newton (N)
What is Net Force? Usually more than one force is acting on an object NET FORCE = combination of all the forces acting on an object
What are Balanced Forces? Forces are balanced when the net force = 0 � Equal forces going in opposite directions � NO ACCELERATION � Object is said to be in equilibrium
What are Unbalanced Forces? Forces are unbalanced when net force ≠ 0 � One � force is greater than another Acceleration occurs
Quick Checks What is net force? What is true about net force when all the forces acting on an object are balanced? � What does this mean for the motion of the object? What is true about net force when all the forces acting on an object are unbalanced? � What does this mean for the motion of the object?
Equilibrium Video https: //www. youtube. com/watch? v=t 0 ak. AKl. J 3 n c
Video Qs What is tension? (force in stretched rope) What is the equilibrium rule? (∑F=0 if the system doesn’t change its state of motion) ∑ - sigma – sum of What would happen to the tension in Burl’s rope if Burl and Hewitt were both on Burl’s side? (Burl’s rope would have ALL the tension – the force would increase)
