Forces
When the forces are not equal in strength and in opposite directions.
Unbalanced forces
The process of an object changing its position.
Motion
This is the ability to do work or cause change.
Energy
This is the location of an object.
Position
This is the force that pull all objects towards the center of the Earth.
Gravity
Two forces of equal strength that combine to act on the same object but in opposite directions.
Balanced forces
When energy makes an object start moving, it is causing this.
Motion
The energy stored in food that allows animals to move is called this
Chemical Energy
Describe the position of the TVs related to table 2 and 3.
Above
This is a force that resists motion.
Friction
A contact force that can slow down, stop, or make things difficult to move.
Friction
True or false: Forces changes the motion and position of objects.
True
When you push a swing, you are using this type of energy to cause motion.
Mechanical Energy (or kinetic energy)
You can describe the position of something by saying left or what word?
Right
Akoni is pushing a box of books up a ramp into a truck.
What can she do so that it will take less force to push the box?
A. tape the box shut
B. do not use the ramp
C. put more books in the box
D. take some books out of the box
D. take some books out of the box
The unit used to measure forces.
Newtons
True or false: Objects in motions do not change speed.
False
This type of energy from the Sun creates changes on Earth, like warming the surface.
Solar Energy
Juan pulls a rope to the left and Ben pulls the rope to the right. The rope stays in the same position. Describe why they do not move.
The forces are equal
Friction is this type of force.
A contact force
Harry Potter is riding a broom playing quidditch. The BROOM is applying this type of force.
Push
Objects in motion can change its position, speed and one other thing.
Direction
When water freezes or melts, energy is causing this type of change.
Change of state (solid to liquid, liquid to gas etc)
A man tries to push a large box full of books safely across the room. The box does not move. He asks for help from other people.
The box starts to move once the third person joined in to help and are three people are pushing together. Based upon this
information, what conclusion can be drawn?
A. The forces acting on the box became unbalanced when the third person started pushing.
B. The box had a mass less than the mass of the first person who tried to push it.
C. The only force acting on the box is the push applied by the people.
D. When the third person started to push, the mass of the box decreased.
A. The forces acting on the box became unbalanced when the third person started pushing.