What is Motion?
An object's change in position relative to a reference point.
What is Force?
A push or pull exerted on an object.
Sunlight passes through the windows of a car and causes the car seats to get hot. Which type of energy flow is involved in heating the seats?
radiation
Electric current that changes its direction repeatedly
alternating current
What is Inertia?
The tendency of an object to resist any change in its motion.
What is the net force?
2N to the left.
The transfer of heat in the atmosphere by winds that circulate between the equator and the
poles is an example of?
convection
closed conducting loop in which electric current can flow continually
circuit
What is a Reference Point?
A place or object used for comparison to determine if an object is in motion.
What is the net force?
9 N to the right.
Energy that is stored
Potential Energy
Rapid movement of excess charge from one place to another
electric discharge
What is Velocity?
Speed in a given direction.
What is the net force?
100 N to the left
Kinetic or potential energy associated with the motion or position of an object
Mechanical Energy
Circuit that has more than one path for electric current to follow
parallel circuit
A rubber ball and a lump of putty have equal mass. They are thrown with equal speed against a wall. The ball bounces back with nearly the same speed with which it hit. The putty sticks to the wall. Which objects experience the greater momentum change?
A) the ball
B) the putty
C) both experience the same momentum change
D) cannot be determined from the information given
A
Mr. Smith and his wife (Mrs. Smith) were trying to move their new chair. Mr. Smith pulls with a force of 30 N while Mrs. Smith pushes with a force of 25 N in the same direction. What is the net force?
55N
A form of potential energy that is stored in chemical bonds between atoms.
Chemical Energy
A measure of the amount of electrical potential energy an electron flowing in a circuit can gain; measured in volts (V)
voltage