Forces. Force = A push or a pull Push PuLL What things produce forces? PUSH PULL.
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Transcript of Forces. Force = A push or a pull Push PuLL What things produce forces? PUSH PULL.
Forces
Force = A push or a pull
Push
PuLL
What things produce forces?
PUSH PUSH
PUSH
PULL
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
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
28.9
__
__
.
smg
mgWeight
maForcetime
velocityinchangeonAccelerati
directionandspeedVelocitytime
distSpeed
