Newtons Laws 1
This is the Law of Inertia
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.
Newton
This states that an object’s motion will not change unless an unbalanced force acts on the object.
Newton's First Law
The unit of acceleration is this.
m/s2
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...
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
A bowling ball collides with a set of bowling pins (at rest) with a force of 15N. What is the force the pins exert on the bowling ball?
15N
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 velocity.
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
A force of 20N acts upon a 5 kg block. Calculate the acceleration of the object.
4m/s2
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 ball is moving with a force 49 Newtons and has an acceleration of 7 m/s2, what is the ball's mass?
7 kg
What is velocity?
How fast something(an object) is moving in a given direction.