Translational Motion
What quantity measures the total length of the path traveled by an object?
DISTANCE
What is the rate at which angular displacement changes with time?
ANGULAR VELOCITY
The __________ is a simple machine that allows a person to exert a force on an object to lift it, using a rigid bar that pivots around a point.
LEVER
What is the unit of Resistance?
ohm Ω
What must be present in a circuit for electric current to flow continuously?
A CLOSED CIRCUIT
What quantity describes an object's change in position from its starting point to its ending point, including direction?
DISPLACEMENT
What angular quantity describes how quickly angular velocity changes?
ANGULAR ACCELERATION
A __________ is a simple machine that consists of a wheel with a rope or cable wrapped around it, often used to lift heavy objects.
PULLEY
According to Ohm's Law, if the voltage increases while the resistance remains constant, the current will also increase. Is it TRUE or FALSE?
TRUE
A student connects another bulb in series with the first bulb. What will most likely happen to the brightness of the bulbs? Why?
They become dimmer because the total resistance increases and current decreases.
What is the rate at which displacement changes with time?
VELOCITY
A dancer completes one full turn. What is the angular displacement in degrees and radians?
360° or 2π rad
When using an inclined plane, the effort needed to lift an object is (less/more) __________ than lifting it straight up due to the longer distance over which the force is applied
LESS
A person accidentally touches a damaged electrical wire and suddenly feels a tingling sensation and cannot easily move away. What electrical hazard might be occurring?
ELECTRIC SHOCK
Two identical bulbs are connected in parallel. One bulb burns out. What happens to the other bulb? Explain.
The other bulb remains lit because it has its own path for current.
A student walks from the classroom to the laboratory at a constant speed of 2 m/s for 15 seconds. What is the total distance traveled by the student?
30 m
Which body part commonly acts as the axis when a person rotates their forearm?
The elbow joint
A machine that combines two or more simple machines to make work easier is called what?
A compound machine.
A student notices that a device draws less current after its resistance increases. What does this tell you about the relationship between resistance and current when voltage is constant?
They have an inverse relationship—as resistance increases, current decreases.
In a circuit, what happens to the electric current when the circuit is open?
No current flows because the path is broken.
A cyclist travels 100 m north and then 40 m south. What is the cyclist's displacement?
60 m north
A student spins a wheel faster and faster. Which angular quantity is changing, and what does this tell us about the wheel's motion?
Angular velocity is changing, so the wheel has angular acceleration.
DECREASE
The law of conservation of energy states that energy can be created or destroyed, which affects machine efficiency. Is it TRUE or FALSE?
FALSE
A student wants two bulbs to remain lit even if one bulb fails. Should the bulbs be connected in series or parallel? Defend your answer using the behavior of current in the circuit.
Parallel, because each bulb has an independent path for current.