Forces
This force comes from two objects rubbing against each other
Friction
What scientist described the 3 laws of motion?
Sir Issac Newton
The strength of an objects gravitational pull depends on what two things?
Mass and Distance
How do we show the direction of motion of an object on a diagram?
arrows ------->
A toy falls off a shelf and lands on a table and stays there. What part of that shows a contact force at work?
The table pushing up on the book holding it in place
(normal force)
This non-contact force is the attraction of a north/south current or field to a metal object
Magnetism
An object in motion remains in motion and an object at rest remains at rest unless acted on by an outside force is an example of?
Inertia
Does Gravity require touching an object? Why?
No, it is a non-contact force
If a box is pushed 10N-------->
and 5n <------------, what is the direction of motion and the Net force?
5 newtons --------->
Name three non-contact forces
magnetic
static electricity (electric force)
Gravity
Nuclear
This non-contact force is the invisible attraction between all objects with mass to all other objects with mass
Gravity
In a vacuum, if a feather and a hammer are dropped at the same time which one would hit the ground first?
They will hit at the same time
If Sarah is standing one meter from a 3kilo block and a 5 kilo block, which one has a stronger gravitational pull?
5 kilo block
A child is using a magnet to pull a metal toy car towards him, what type of force is causing the motion?
Magnetic Force (non-contact)
The more mass an object has the more What does it have?
Gravitational pull
This contact force describes a book laying on a table
normal force
What force causes objects like leaves and feathers to float slowly to the Earth's surface?
air resistance
Jeff is 10 ft from a 1 pound rock, and 5ft from another 1 pound rock, which one has a greater gravitational pull?
The rock that is 5ft away
A soccer ball is rolling towards Jim, if he kicks it as hard as he can what will happen to the direction and speed of the ball?
It will change direction and increase in speed
Which statement is true?
Increasing the distance between objects decreases the gravitation pull
Increasing the objects mass decreases the objects gravitational pull
Increasing the distance between objects Decreases the gravitational pull
(increasing mass Increases the gravitational pull)
Friction slowing down a soccer ball is an example of what type of force?
Contact
Does static electricity have to be touching to work? Why?
No, it is a Non-Contact force
The Earth and Moon have a gravitational pull on each other, what would happen if the moon was much farther away from the Earth?
The gravitational pull would decrease (get weaker)
Which force requires a touch for a push/pull to occur to an object?
A. Magnetism B. Friction
C. Gravity D. Static Electricity
B. Friction
Static electricity causing hair to be attracted to a brush is an example of what type of force?
Non-Contact