Key Terms
What is the energy of a moving object?
Kinetic Energy
How is kinetic energy related to motion?
KE is the energy an object has when it's moving.
How does friction affect motion?
Friction opposes motion between two surfaces in contact.
What happens to forces during a collision?
The forces are equal in strength and opposite in direction,
What happens to energy during a collision?
What is the energy to an object's position?
Potential Energy
What is potential energy?
The energy an object has because of its position or stored energy.
What happens when mass doubles while the speed is constant?
The kinetic energy increases by double.
What object experiences more force: a car or a bike??
How does potential energy convert to KE?
When an object is released or moves downward, potential energy converts to kinetic energy.
What opposes motion between two surfaces?
Friction
What happens to KE during a collision?
KE may transferred or converted to other forms.
What is the effect of speed on kinetics energy?
KE increases with speed, doubling speed increases the energy by 4 times more.
What causes more damage in a collision?
The heavier object
Why do heavier objects require more force to change motion?
Because they have more mass, requiring greater force to achieve the same acceleration
What forces comes from air to slow down objects?
Air resistance
How does air resistance affect KE?
Air resistance decreases KE as energy is transferred to other forms.
What object requires more force to change speed, heavy or light?
Heavier objects require more force.
Explain the effects of mass on collision outcomes.
Heavier objects transfer more energy during a collision, causing more damage.
What forms can energy be transferred to?
Heat, sound or deformation
What is the maximum deformation an object can have?
Elastic Limit
What increases kinetic energy: mass and speed?
Both mass and speed contribute but speed has a greater affect.
How do friction and air resistance affect energy transfers?
They cause moving objects to lose KE to hear or sound.
DAILY DOUBLE:
If you triple the speed, the KE increases by
9 times more
Explains how air resistance affects moving objects?