When is it clear when balanced forces are acting on an object?
A.The object changes direction
B. The objects motion stops
A.
100
Which law is this? For every action there is a reaction.
Newtons 3rd law
100
What is the energy of motion?
Kinetic energy
100
What is gravity?
(Bonus- more _______=more pull)
a force of attraction
Bonus-mass (extra 100 points)
200
The speed and direction in which an object moves
Velocity
200
Just prior to touchdown on the moon, a space ship fires rockets to slow its fall. Which force are the rockets designed to go against?
A. Friction
B. Magnetic force
C. Gravity
C. Gravity
200
How many laws are there in Newtons laws?
Three
200
What is Mechanical energy
Mechanical energy is all kinetic energy and potential energy in an object
200
what is unbalanced force?
Unbalanced Force-an unequal force that changes an objects motion
300
What is the difference between balanced forces and unbalanced forces.
Balanced forces- Describes equal forces that combine to act on an object in opposite directions
Unbalanced forces- A force that causes an object to change its motion
300
The same forces is applied to all of these objects ( bowling ball, car, pencil, train). Which object is most likely to move?
Pencil
300
what is newtons 1st law?
An object in motion will stay in motion unless a force acts upon it.
300
What is potential energy?
Potential energy is stored energy in an object.
300
What causes a water wheel to turn?
A. water
B. friction
C.gravity
Gravity
400
What is stored energy?
Potential energy- Energy of waiting because of its position
400
In order to win a game of tug-of-war, what must happen?
A. The teams must pull with increasing force
B. One team must pull with greater force than the other
B.
400
Which law is this?
Acceleration depends on mass of an object and the forces acting on it.
Newtons 2nd law
400
How many types of force energys are there?
3
400
What is the reason a brick wont slide down a ramp? (a force)
Friction
500
Which definition matches work
A. When a force is used to move an object through a distance
B. Tendency of an object to resist change in its state of motion
C. A push or pull that acts on an object
500
If a basketball player is bouncing a ball what action should the player use to bounce higher?
A. Decrease the force used to bounce the ball
B. Increase the force used to bounce the ball
C. Bounce the ball fewer times with the same force
500
What are Newtons 3 laws based on?
Forces
500
At the top of a roller coaster hill what type of force energy is it?