Forces
Force
What is required to change a an objects state of motion?
Distance/time
What is the equation to calculate speed?
A restatement of Galileo’s idea that a force is not needed to keep an object moving.
What is Newton's first law?
Acceleration
What is the rate at which velocity changes over a certain period of time?
Air resistance
Why do feathers float/fall slower?
A push or pull
What is force?
Mass * Velocity
What is the equation to calculate momentum?
The relationship among an object's mass, an object's acceleration, and the net force on an object
What is Newton's second law of motion?
Speeding up and slowing down
What are two different ways an object can accelerate?
The mass of objects
What causes gravity?
The combination of all force acting on an object
What is Net Force?
Mass/volume
What is the equation to calculate density?
Every object object continues in a state of rest, or of uniform speed in a straight line, unless acted on by a nonzero net force
What does Newton's first law state?
a=v0/t=v/t
What is the equation for acceleration?
Isaac Newton
Which scientist was credited with first describing the mathematics of gravity?
The upward force that balances the weight of an object on a surface
What is support force?
v=xf-xi/t = △ x/t
What is the formula for velocity?
The acceleration produced by a net force on an object is directly proportional to the magnitude of the net force, is in the same direction as the net force, and is inversely proportional to the mass of the object.
What does Newton's second law state?
m/s^2
What is the unit of acceleration?
v=48
What is v if u=12, a=9, t=4?
Friction
What acts on materials that are in contact with each other and always acts in a direction to oppose relative motion?
a = v - u/t
What is the acceleration formula?
acceleration = net force/mass
What is the equation for Newton's second law?
It increases the amount of force it has, f=ma, f=10N, m =10kg, then a=1m/s^2
What happens to acceleration when the force is increased?
w=9.778N
What is the force of gravity acting on an object at the Earth's surface?