Forces. Force = A push or a pull Push PuLL What things produce forces? PUSH PULL.

Forces

Force = A push or a pull

What things produce forces?

PUSH PUSH

Vector = A line indicating the strength and direction of a force

Strong force upwards Weak force downwards

Weak force to the left Strong force to the right

More than one force can be acting on an object at once.

Air resistance

Gravity

Unbalanced forces lead to a change in velocity

Speed = rate of movement (mph, ft/sec)Velocity = speed and direction

Speed200 kilometers per hourVelocity200 kilometers per hour to the west

Anytime you see a change in velocity (speed and/or direction) then there are unbalanced

forces at work…

Air resistance

Gravity

Faster

Slower

Friction

Friction = A force between surfaces in the opposite direction of motion.

When forces are balanced, there is no change in velocity

Normal force of beam

Gravity

Team 1 Team 2

Result… No change in velocity!

Balanced forces are equal and opposite

In space…

Measuring Force

• Forces are measured in Newtons (N)• Force can be calculated with the following

formula:F=ma

Force = (mass)(acceleration)• Acceleration is the rate of change in velocity

Important Formulas for Your Notebook

mgWeight

maForcetime

velocityinchangeonAccelerati

directionandspeedVelocitytime

distSpeed

Forces. Force = A push or a pull Push PuLL What things produce forces? PUSH PULL.

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