Friction
Equations
Forces
Newton's Law?
This & That
100
The force that brings nearly everything to a stop.
What is friction?
100
A = F/m
What is the equation to determine acceleration?
100
A push or a pull.
What is force?
100
An object at rest remains at rest and an object in motion will continue in that motion until acted upon by a net force.
What is Newton's First Law?
100
Exists between any two objects that have mass.
What is gravity?
200
The type of friction acting on surfaces sliding on each other.
What is sliding friction?
200
F = ma
What is equation to determine net force?
200
If Fufu pushes against a wall with a force of 5N, the wall is doing this.
What is pushing back with a force of 5N?
200
Every time you change speed or direction, Newton's ______ describes the action.
What is Newton's Second Law?
200
Acts against the direction of motion and gets larger as an object moves faster.
What is air resistance?
300
The type of friction that acts on a rolling wheel.
What is rolling friction?
300
The acceleration if you exert a net force of 8N on a 2-kg object.
What is 4 m/s squared? A = F/m A = 8N / 2kg A = 4 m/s squared
300
The forces that cause an object's motion to change.
What are unblanced forces?
300
For every action there is an equal and opposite reaction.
What is Newton's Third Law?
300
A measure of the gravitational force pulling down on an object.
What is weight?
400
Walking would be impossible without this.
What is rolling friction?
400
The net force if a 0.4-kg object accelerates at 2 m/s squared.
What is 0.8N? F = ma F = 0.4kg x 2 m/s squared F = 0.8N
400
The forces acting on an object, but the object's motion does not change.
What are balanced forces?
400
Newton's second law of motion connects these three things.
What are force, acceleration, and mass?
400
Is the speed an object reaches when the force of gravity is balanced by the force of air resistance.
What is terminal velocity?
500
The type of friction you have to overcome to push a stationary object.
What is static friction?
500
F = m(9.8m/s squared)
What is the equation to determine the gravitational force on any object near the Earth's surface?
500
Give an example of balanced and unbalanced forces.
*answers may vary* What is two people pushing on opposite sides of a door but the door does not move = balanced. Two people pushing on opposite sides of the door, one with more force than the other, causing the door to move in the direction of the greater force = unbalanced.
500
An object acted upon by a net force will accelerate in the direction of the force.
What is Newton's Second Law?
500
Is the outward forces exerted by a surface.
What is normal force?
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