50 terms

# Newtons Law forces and motion

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What is acceleration?
What is the rate of change of velocity?
What is the average speed?
What is the total distance traveled by the total time of travel?
What is balanced force?
What are forces on an obnject that are equal in size and opposite in direction?
What is velocity?
What is the speed of an object and the direction of its motion.
What is inertia?
What is the tendency of an object to resist any change in its motion?
What is force?
What is a push or pull that is applied on an object?
What is speed?
What is the distance an object travels per unit of time?
What is displacement?
What is the distance and direction of an object's change in position from the starting point?
What is instantaneous speed?
What is the speed at a given point in time?
What is distance?
What is how far an object has moved?
What is net force?
What is the combined forces when 2 or more forces act on an object at the same time?
What is air resistance?
What is a friction-like force that opposes the motion of objects that move through the air?
What is momentum?
What is the product of an object's mass and velocity?
What is weight?
What is the gravitational force exerted on an object?
What is Newton's 2nd?
What is the acceleration of an object is in the same direction as the net force on an object?
What is centripetal acceleration?
What is the acceleration of an object is in the same direction as the net force on an object?
What is gravity?
What is an attractive force between any two objects that depends on the masses of the objects and the distance between them?
What is Newton's 3rd acceleration?
When one object exerts a force on the first that is equal in strength and opposite in direction?
What is static?
What is frictional force that prevents two surfaces from sliding past each other?
What is centripetal force?
What is the net force exerted toward the center of a curved path?
What is sliding?
What is the force that opposes motion of two surfaces sliding past each other?
What is friction?
What is the force that opposes the sliding motion of two surfaces that are touching each other?
what is the net force on an object when the forces are balanced?
zero
When will an object in motion at constant velocity change its motion?
When an inbalanced net force acts on it
What is it that causes you to crash into a windshield during a car crash?
inertia
Motion is a change in ?
position
Why is it necessary to wear a seat belt when riding in a car that crashes?
Because your body continues to move forward due to inertia. The seat belt will hold you back.
55 mi/hr north is an example of ___.
velocity
The equation used to find acceleration is___?
check your review sheet for formulas
Inertia varies depending on ___?
Mass
Newton's First Law of Motion is also called ____.
Law of Inertia
At the same speed a softball is harder to stop than a ping-pong ball because of ____.
inertia (more mass)
Newton's 2nd law of motion describes how what three things are related?
force and mass and acceleration
State Newton's 1st Law of motion.
An object moving at a constant velocity keeps moving at that constant velocity unless an unbalenced net force acts on it. If an object is at rest, it stays at rest, unless an unbalanced net force acts on it.
What is the formula for Newton's 2nd law of motion?
a=F/m
What is 1 Newton equal to?
1 N= 1Kgm/s2
What two things does the acceleration of an object depend on?
Force and mass
What are two types of friction?
static and sliding
What are two things that friction depends on?
type of surface and the force pressing the two surfaces together
You push yourself on a skateboard with a force of 30 N and accelerate at 0.5m/s2. Find the mass of the skateboard if your mass is 58 kg. Show all work.
What are two things that air resistance depends on?
size and shape
If you have a cannonball being fired from a cannon and the cannon recoils, describe the action and reaction forces.
action=ball (cannonball) coming out of cannon; reaction=cannon going backwards
When an object falls it is reacting to what force?
gravity
For any object, the greaterforce that is applied, the greater its ____ will be.
acceleration
Explain why our piece of regular paper took longer to fall to the ground than the wadded up piece of paper.
The flatter (regular) piece of paper has a greater air resistance (because of greater surface area) and therefore hit the ground last.
State Newton's 3rd law of motion?
When one object exerts a force on a second object, the second object exerts a force in the first that is equal in strength and opposite in direction.
Explain what happened, which Newton Law, and its relationship to the Law in the lab with a raw/hard boiled egg.
What happened? When "stopped" raw egg kept spinning while hard egg stopped. It's Newton's 1st law. The explanation of the relationship to Newton's law is inertia. The liquid in raw egg kept moving causes to spin (object in motion)
Explain what happened, which Newton Law, and its relationship to the Law in the lab with a marble and pan.
What happened? pan with cut out/marble straight. It's Newton's 1st law. The explanation of the relationship to Newton's law is walls of pan no longer gave a force to change direction of marble.
Explain what happened, which Newton Law, and its relationship to the Law in the lab with Newton Car.
What happened? more force, more mass makes more acceleration. It's Newton's 2nd law. The explanation of the relationship to Newton's law is acceleration is in direction of net force-acceleration depends on mass and force.
Explain what happened, which Newton Law, and its relationship to the Law in the lab with Balloon rocket.
What happened? baloon propels forward. It's Newton's 3rd law. The explanation of the relationship to Newton's law is active-air out of balloon reaction-balloon forward.