Newtons Laws
Newton's 1st law of motion
What is An object at rest will remain at rest and an object in motion will continue moving at a constant velocity unless acted upon by a net force?
The formula for force.
What is force=mass x acceleration
f=ma
Definition of weight.
What is the force of gravity on an object ?
Definition of friction.
What is a force that opposes the motion of objects that touch as a move past each other?
Projectile motion:
What is the motion of a falling object after it is given an initial forward velocity?
Newton’s 2nd law.
What is the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass?
the definition of force.
What is a push or pull that one body exerts on another?
definition of terminal velocity.
what is the maximum velocity reached by a falling object?
The four main types of friction.
What are static friction sliding friction rolling friction in fluid friction?
define momentum:
What is the product of an object's mass and velocity?
Newton’s 3rd law
What is when one object exerts a force on a second object the second object exerts an equal but opposite force on the first?
the definition of net force.
What are unbalanced forces that are not opposite and equal?
definition of air resistance.
what is the fluid friction acting on an object moving through the air?
definition of rolling friction.
what is the friction that acts on rolling objects?
Net force definition.
What is unbalanced forces that are not opposite and equal?
As a bird flies through the air, their wings push down on the air and the air pushes up on their wings. What law does this demonstrate?
what is Newton's third law?
solve the equation on the board.
what is 4n?
Definition of inertia.
what is the tendency to resist any change in its motion?
Sliding friction definition.
What is a force that opposes the direction of motion of an object as it slides over a surface?
Free fall definition.
What is when gravity is the only force acting on an object?
imagine you roll a ball at a constant velocity until it hits a wall and then ricochets back to you. What 2 laws are used?
what is Newton's first law because the ball rolled at a constant velocity until a force acted upon it.
Newton's third law because the wall exerted an equal and opposite force on the ball.
mary is riding her bike at 1m/s2 her mass is 57 kg the mass of the bike is 1/4 of that what is her force.
f=ma f=71.25kg x 1m/s2
m=57+57/4=71.25 f=71.25n
a=1m/s2
What is gravity?
What is the force of attraction between any two objects in the universe?
Static friction:
What is the friction force that acts on objects that are not moving?
State the law of conservation of momentum:
What is if no net forces act on a system, then the total momentum of the object does not change?