Show:
Gravity
Magnetisum
Friction
Newton's Laws
Cause and Effects of Lubricants
100
________ is a pull that attracts objects to each other.
What is Gravity.
100
Magnetism is an invisible _____ that acts as a distance.
What is a force.
100
____ is a force that opposes motion when two surfaces rub against each other.
What is friction.
100
For every action there is an equal and opposite reaction.
What is Newton's 3rd Law of Motion.
200
Gravity is what causes objects to ____.
What is fall.
200
______ poles repel each other.
What is like.
200
One example of friction is when something is _____ and it stops.
What is sliding.
200
_______ is produced when a force acts on a mass.
What is acceleration.
300
Gravity pulls the ocean towards the moon causing what.
What are tides.
300
The ______ the object is to the more of a magnetic force.
What is closer.
300
Harder surfaces and more what increase friction.
What is pressure.
300
Every object in state of steady motion tends to what in that motion unless acted upon a greater force.
What is stay.
400
Gravity between the Earth and anything on it is strong and noticable because the what of the Earth is so large.
What is mass.
400
The what of a compass uses magnetism to find the north.
What is the needle.
400
It would be hard to what without friction.
What is slow down.
400
The equation for Newton's Second Law of motion.
What is F=ma.
500
Gravity is __________ unless it is something large like a star or a planet.
What is unnoticable?
500
This force is caused by objects called what.
What are magnets.
500
Friction can be reduced by _____.
What is lubricants.
500
Every object in the universe attracts every other object with the force directed along the line of centers for the two objects.
What is Newton's Law of Universal Gravitation.
500
The brick is hard to pull because of the roughness and clumpiness of the peanut butter, causing more friction.
What is the effect of peanut butter spread on the floor then the brick is pulled.