Physics Flashcards
Where does a muscular force come from?
It comes from the expanding and contracting of muscle tissue
How is an elastic force produced?
It is produced by any bent or stretched object that returns to its original shape
What does friction do?
Friction opposes motion whenever two surfaces are touching
What is Gravity?
Gravity is the force of attraction between two objects
Equal forces applied in opposite directions are said to be ____________ forces
Balanced
An unbalanced force cause an object at rest to do what?
To start moving
What does an unbalanced force cause
Acceleration
What is a force
A Force is any cause of a change in motion
What is an unbalanced force
A force that causes a change in motion
Which forces are acting on a parked car
Gravity and gasses
Who made observations about forces on moving or unmoving objects
Sir Isaac Newton
What does the first law of motion states
- An object at rest remains at rest unless acted upon by an unbalanced force
- An object in motion continues to move at a constant speed in a straight line unless acted upon by an unbalanced force
What is Inertia
The tendency of an object to oppose a change in motion
What is a centripetal force
The inward force that keeps an object moving in a circle
What are riding a bicycle you suddenly step on the brakes explain why you feel thrown back slightly
Because of inertia and because of an unbalanced force you have a change in speed and direction
What is heat
A form of energy that usually results in a temperature rise in a substance or a object. OR
The energy transferred between material or parts of a material that have different temperature
What are the sources of heat
Sun
Light
Television
Fire
What is temperature
A measure of how hot or cold something is. OR
the measure of the average kinetic energy in an object