Momentum
Finish the sentence:
The total momentum of any group of objects remains ___________, unless _________ act in the objects.the same; outside forces
How many Newton's laws of motion are there?
Define work.
A wheelbarrow is what type of simple machine.
What is lever?
Give an example of Acceleration.
The answer could be, but isn't limited to racing, turning a corner, ferris wheel, carousel, slide, etc.
What is Momentum?
What is inertia?
Resistance to change in motion.
What is the formula for work?
W=Fd where F=force and d=distance.
A ramp is what type of simple machine?
Inclined Plane
Define acceleration.
Acceleration is increasing speed, decreasing speed, or changing directions.
What is the law of conservation of momentum?
The law of conservation of momentum states that in the absence of outside forces like friction, the total momentum of objects that interact does not change.
What does Newton's First Law of Motion state?
States that an object at rest will remain at rest unless acted upon by a nonzero net force. An object moving at a constant velocity will continue moving at a constant velocity unless acted upon by a nonzero net force.
What unit is work measured in?
Joules (J)
What do simple machines do?
Simple machines decrease the amount of effort needed to complete a given task, but don't decrease the total amount of work. Simple machines can also change the direction in which work occurs, for example screw.
What is the unit for measuring acceleration.
m/s^2
A Ford F-150, which weighs 1814 kg, is going 40 m/s. Calculate the momentum of the truck.
What is 72,560 kg*m/s?
What does Newton's Second Law of Motion state?
It states: that an object's acceleration depends on its mass and on the net force acting on it.
What unit is power measured in?
Watts (W)
Define a screw, and its purpose.
A screw is a simple machine that converts torque/rotational force to linear motion. It is often used to secure objects in place.
What is the formula for acceleration?
Final Speed-Initial Speed / Time
Name the formula for momentum.
What is Momentum = Mass x Velocity?
What does Newton's Third Law of Motion state?
It states: if one object exerts a force on another object , then the second object exerts a force of equal strength in the opposite direction of the first object.
What is the formula for power?
P=J/t where J is Joules and t is time.
Name the three types of pulleys.
What are fixed, movable, and compound pulleys
Find the acceleration: Speed = 24m/s. Initial Speed = 0m/s. Time = 3s.
Acceleration = 8m/s^2