A brief review of Forces Balanced and Unbalanced Contact and Action-at-a-Distance.

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A brief review of Forces Balanced and Unbalanced Contact and Action-at-a- Distance

Transcript of A brief review of Forces Balanced and Unbalanced Contact and Action-at-a-Distance.

Page 1: A brief review of Forces Balanced and Unbalanced Contact and Action-at-a-Distance.

A brief review of Forces

Balanced and Unbalanced

Contact and Action-at-a-Distance

Page 2: A brief review of Forces Balanced and Unbalanced Contact and Action-at-a-Distance.

Balanced vs Unbalanced

Balanced Unbalanced

If there is acceleration, then there is an unbalanced force.If acceleration is zero, then the forces are balanced.

Page 3: A brief review of Forces Balanced and Unbalanced Contact and Action-at-a-Distance.

Are these balanced or unbalanced forces?

A Racecar at the start of a race.A car parked on the side of a hill.A minivan using cruise control, on a flat highway.

Page 4: A brief review of Forces Balanced and Unbalanced Contact and Action-at-a-Distance.

Remember: Acceleration is any change in velocity! Slowing down, Speeding up, or changing direction.

Acceleration equals zero if an object is not moving, or if it is moving at a constant velocity.

Page 5: A brief review of Forces Balanced and Unbalanced Contact and Action-at-a-Distance.

Contact and Action-at-a-Distance

•Contact Forces- Those that need to physically touch an object.

•Action-at-a-Distance Forces- Those that do not need to touch an object.

Page 6: A brief review of Forces Balanced and Unbalanced Contact and Action-at-a-Distance.

Contact Forces• Friction

• Tension

• Air Resistance

• Applied

• Spring

• Normal

Action-at-a-Distance Forces• Magnetic

• Electrical

• Gravitational