Newton's Laws of Motion
True or False: An object in motion will stay in motion.
True
True or False: Because of inertia, a resting object will remain at rest.
True
True or False: An unbalanced force does not affect motion.
False!
True or False: The rougher the surface, the faster an object will travel over the surface.
False!!
This force attracts all objects toward each other.
The force of Gravity.
If a rock is at rest, and is not being acted on by an unbalanced force; will it move or will it remain at rest?
It will remain at rest!
Inertia is the tendency of an object to resist a change in its ___________.
Motion!
Gravity pushes things which way on the Earth.
Down!!
How does friction affect the speed of an object?
More friction decreases speed of an object, and less friction increases speed of an object.
As an object's mass increases, its gravitational pull will ____________.
Increase!!
Which of Newton’s laws states that an object at rest is able to remain at rest, unless acted on by an unbalanced force?
Newton’s First Law of Motion (Law of Inertia)
True or False: All objects have inertia, whether they are moving or not.
True!!
A force is necessary for __________.
Causing acceleration or changing an object's state of motion.
Friction acts in a direction ___________ to the object's direction of motion.
Opposite!
The force of gravity acting on an object is the object's ______.
Weight (Mass X Gravity)
True or False: For every reaction an object gives, there is an opposite but equal reaction exerted on that object
True!!!!!
If a 100 pound sled and a 50 pound sled were to be pushed at the same, which of these objects would travel the farthest?
The 100 pound sled would travel the farthest due to a higher mass and a greater inertia.
What is the difference between an Unbalanced force and a Balanced force?
Balanced force is when an object is either at rest or moving at a constant velocity; as an Unbalanced force is when object is accelerating in the direction of the Net Force.
Which type of friction occurs when solid surfaces slide over each other?
Static Friction!
True or False: The mass of an object remains constant, but the weight of the object will differ on the moon and other planets
True!!
If a shopping cart is pushed onto the highway, will it remain at constant velocity or will it accelerate in the direction it is pushed?
It will accelerate in the direction it is pushed due to Newton’s Second Law of Motion (Force Law)
To change the motion of an object, inertia must be overcome by a __________ acting on the object.
Force!!
As distance between two objects increases, the pull of gravity ________.
Decreases!
What are 2 factors that determine the amount of friction between 2 objects?
The force and roughness between the surfaces.
What controls the orbit of all planets around the sun in our solar system?
The sun's gravity