Definitions
speed
The distance an object moves in an amount of time.
Balanced forces cause no movement. True or false?
True
Gravity
What type of energy transformation happens in a toaster?
electrical energy into thermal energy
Car P is going 65 mph and Car Q is going 60 mph. Which has more kinetic energy?
Car P (faster speed = more kinetic energy)
energy
The ability to do work.
Unbalanced forces cause movement. True or false?
True
Why don't we float into space?
Gravity
What energy transformation takes place in a ceiling fan?
Motion energy
What happens to the kinetic energy of a soccer ball when it hits the net?
It decreases (speed slows down).
acceleration
A change in velocity over time (speeding up, slowing down, or changing direction).
Forces can change an object's _______ & _______
speed & direction
Give a real life example of friction
EX: rubbing hands together.
What energy transformation takes place in a light bulb?
Electrical energy → Light energy
What is the energy conversion when a jogger walks, rests, then runs again?
Kinetic → Potential → Kinetic energy
force
A push or pull.
Pushing a car is an example of a contact force. True or false?
True
What energy transformations occur when a ball is dropped and hits the floor?
Potential → Kinetic → Sound energy
velocity
The speed and direction of an object
Gravity pulling a ball down is what type of force?
Non-Contact
What type of energy change happens when a rock is pushed down a hill?
Potential energy → Kinetic energy