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Page 1: Forces. Force = A push or a pull Push PuLL What things produce forces? PUSH PULL

Forces

Page 2: Forces. Force = A push or a pull Push PuLL What things produce forces? PUSH PULL

Force = A push or a pull

Push

PuLL

Page 3: Forces. Force = A push or a pull Push PuLL What things produce forces? PUSH PULL

What things produce forces?

PUSH PUSH

PUSH

PULL

PULL

Page 4: Forces. Force = A push or a pull Push PuLL What things produce forces? PUSH PULL

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

Page 5: Forces. Force = A push or a pull Push PuLL What things produce forces? PUSH PULL

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

Air resistance

Gravity

Unbalanced forces lead to a change in velocity

Page 6: Forces. Force = A push or a pull Push PuLL What things produce forces? PUSH PULL

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

Speed200 kilometers per hourVelocity200 kilometers per hour to the west

Page 7: Forces. Force = A push or a pull Push PuLL What things produce forces? PUSH PULL

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

forces at work…

Page 8: Forces. Force = A push or a pull Push PuLL What things produce forces? PUSH PULL

Air resistance

Gravity

Page 9: Forces. Force = A push or a pull Push PuLL What things produce forces? PUSH PULL

Faster

Slower

Page 10: Forces. Force = A push or a pull Push PuLL What things produce forces? PUSH PULL

Friction

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

Page 11: Forces. Force = A push or a pull Push PuLL What things produce forces? PUSH PULL

When forces are balanced, there is no change in velocity

Normal force of beam

Gravity

Page 12: Forces. Force = A push or a pull Push PuLL What things produce forces? PUSH PULL

Team 1 Team 2

Result… No change in velocity!

Balanced forces are equal and opposite

Page 13: Forces. Force = A push or a pull Push PuLL What things produce forces? PUSH PULL

In space…

Page 14: Forces. Force = A push or a pull Push PuLL What things produce forces? PUSH PULL

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

Page 15: Forces. Force = A push or a pull Push PuLL What things produce forces? PUSH PULL

Important Formulas for Your Notebook

28.9

__

__

.

smg

mgWeight

maForcetime

velocityinchangeonAccelerati

directionandspeedVelocitytime

distSpeed


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