Gravity
What branch of Science is this unit under? (Chemistry, Biology, Physics, Geology)
Physics
Define what a "force" is.
A push or pull
Name any force that we talked about in this lesson.
Frictional force, normal force, air resistance force, applied force, spring force, gravity, electrical force, magnetic force.
What is gravity?
Gravity is the force by which masses attract one another. or A pulling force exerted by the Earth (or anything else that has mass).
In the absence of friction, if a force acting on a moving object stops acting, what will happen to the motion of the object?
It will keep moving at a constant speed.
What is the name of the force that causes an airplane to SLOW down?
Drag (Air resistance)
The force that keeps satellites in orbit around Earth is....(magnetic, friction, electrical, gravity)
Gravity
•A type of friction caused by air pushing against any moving object.
Air resistance
If you drop a book and a piece of paper, the paper will fall slower, why?
Because of air resistance.
Explain why you would weigh less on the moon.
Because the gravitational pull is not as strong as it is on Earth.
Define buoyancy (Upthrust)
An upward forces that a liquid applies to objects.
If a box is pushed to the left at 10 N and also pushed to the right at 6 N, what direction with the box move?
Left
What is the difference between mass and weight?
Mass is how much "stuff" is in an object and Weight is the gravitational pull that the object feels towards Earth's center.
True or False
Friction always acts in the opposite direction to the moving object.
True
What is the difference between contact forces and noncontact forces? Also, give an example of each.
Contact Forces- occurs with an object being in contact with another (Friction), Noncontact- invisible forces that do NOT require objects to be in contact (gravity)