The combined strength and direction of all forces acting on an object is called...
net force
100
Gravity is a force that does this.
pulls/ attracts
100
This is a property of matter in which an object resists a change in its state of motion. If its moving, it tends to stay in motion. If its at rest, it wants to stay at rest.
What is inertia?
100
The Earth experiences spring tides (extreme high tides and extreme low tides) during these moon phases
a full moon and a new moon
200
Force is described by its...
strength and direction
200
If two forces are acting in opposite directions, this is how you calculate the net force.
subtract them (find the difference)
200
The law of universal gravitation states that any two objects in the universe that have ________ will attract each other.
mass
200
Why does a bowling ball have more inertia than a golf ball?
Because a bowling ball has more mass.
200
A solar eclipse can happen during this moon phase.
a new moon
300
The unit we use to measure force is...
Newtons
300
The net force acting on the boat.
175N to the right
300
The strength of the force of gravity between two objects depends on their _____________ and ____________
mass and distance
300
The first law of motion is also called the law of__________
inertia
300
Why do neap tides occur? Draw the positions of the Earth, moon and sun.
The gravity of the Earth and moon cancel each other out, making tides even out.
400
Two equal and opposing forces that do not cause a change in motion are called...
balanced forces
400
The net force acting on the car.
zero N
400
This type of friction acts against an object falling to the Earth in freefall.
air resistance
400
According to Newton's Second Law of motion, you can calculate the force acting on an object by multiplying these two factors.
mass and acceleration
400
This moon phase occurs right before a full moon.
a waxing gibbous
500
Anytime there is __________, that means forces are unbalanced.
motion
500
The net force acting on the rope.
60 N to the right
500
As the moon orbits the earth, gravity keeps the moon ________ and inertia keeps the moon ________.
close to Earth... moving
500
This is what happens to the acceleration if you double the amount of force applied to an object.
it doubles (it goes twice as fast)
500
What part of the Earth would experience 24 hours of daylight on December 21st?