Newtons Laws
This is the Law of Inertia
Esta es la ley de la inercia
Newtons First law
What force stops a ball that is thrown in the air from flying up forever?
Gravity
The unit of force is this.
La unidad de fuerza es esta.
Newton
This states that an object’s motion will not change unless an unbalanced force acts on the object.
Newton's First Law
What force is the resistive force that occurs between an object (it might be increase or decrease the speed)
Friction
According to Newton’s Second Law, increasing the force applied to a mass has this result.
Increases acceleration of the object
A box is being pushed to the right across the floor. What force is acting towards the left?
Friction
Newton's third law states...
La tercera ley de Newton establece...
Any action force has an equal and opposite reaction force.
Example of a non-contact force?
Gravity, magnetic force
Mass has this unit.
kg, kilogram
A 1kg object accelerates at a rate of 10m/s2. Calculate the net force of the object.
10N
What force is the supporting force for gravity?
Normal Force
A car and a train are going the same speed. The car is easier to stop because of this.
less mass and less inertia
This occurs whenever an object is acted upon by an unbalanced force.
acceleration, change in motion
This is required to overcome an object’s inertia.
An unbalanced force, any net force
An object at rest has this Net Force of...
Zero
If you want to increase the acceleration of a baseball when you throw it, what must you increase to make this happen?
Force
Newtons law of action and Reaction
3rd law
Newton's second law's equation
F = m x a
If the bird pushes down on the fence post what is the reaction occuring?
The fence post pushing up on the bird
Two ice skaters push off of each other and they both glide in opposite directions. Which of Newton's Laws does this best represent?
Newton's 3rd Law
Which shopping cart will accelerate faster-a small one with a mass of 5kg or a large one with a mass of 3kg?
The large one with a smaller mass.
A baseball player hits a ball. The action force is the force of the ball on the bat. What is the reaction force
The force of the bat on the ball.
If a 7 kg ball is moving with an acceleration of 7 m/s2, what is the ball's Force
49 N
How does is the Newton's cradle a good example of all three laws?
Newton's First Law
The balls remain at rest until a force is applied.
Newton's Second Law
When a ball is lifted, it gains potential energy and, upon release, accelerates downward due to gravity.
When the first ball strikes the line of stationary balls, it exerts a force (the action) on the next ball.
The last ball in the line swings out, exerting an equal and opposite reaction force back onto the ball that hit it