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100
Which body parts act like a fulcrum in the body?
What is Joints
100
When you rub your hands together on a cold day, you use friction to transform
What is Mechanical energy to Thermal energy
100
Rockets move forward because of what action reaction force?
What is Gasses shooting out the back of the rocket push it in the opposite direction.
100
For work to be done on an object, the object must
What is Move some distance as a result of force
100
According to Newton's third law of motion, when a hammer strikes and exerts a force on a nail,
What is the nail exerts an equal and opposite force on the hammer.
200
The energy associated with motion is
What is Kinetic Energy
200
A rock Poised for a fall; an archer's bow that is drawn back; a rolling bowling ball; a car waiting at a red light: Name the energy for each
What is Potential,Potential, Kinetic, Potential
200
The total momentum of a group of objects is conserved unless
What is outside forces act on the objects
200
In order for work to be done on an object, the force you exert must
What is be in the same direction as the objects motion
200
To increase the momentum of an object, you can
What is increase the mass or velocity of the object
300
Day and night are caused by
What is earths rotation on its axis
300
When an objects position relative to another object is changing, it is in
What is motion
300
Which of these is an example of work being done on an object?
What is pushing a child on a swing
300
Throwing sand on an icy driveway is an example of
What is increasing friction
300
The greater the mass of an object, the greater the
What is inertia
400
Pulling down on a rope to hoist a a sail on a sailboat is an example of a machine
What is changing the direction of the exerted force.
400
The tendency of an object to resist a change in motion is known as
What is inertia
400
Unlike kinetic energy, potential energy is
What is stored
400
The mass of a rover would be greater on ________. It _______ The __________ on the earth, moon, and Jupiter.
What is none;stays;same
400
To keep the earth and moon in orbit you need
What is gravity and inertia
500
Compound machines have
What is 2 or more simple machines
500
The ability to do work or cause change is called
What is energy
500
Forces can be combined only if they are
What is acting on the same object
500
speed and velocity are similar except velocity has a
What is directional component
500
Which does no work?
What is holding a baseball
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