# KinematicsRotationEnergyWaves Electricity 100 200 300 400 500 100 200 300 400 500 200 300 400 500 200 300 400 500 200 300 400 200 300 400 500 Dynamics

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• KinematicsRotationEnergyWavesElectricity100200300400500100100100100100200300400500200300400500200300400500500200300400200300400500Dynamics &Equilibrium

• Answer: speedWhat other term could be used for the magnitude of the velocity of an object?

• What is the slope of a displacement versus time graph equal to?Answer: velocity

• In a projectile problem, what must you do with the initial velocity?Answer: determine its horizontal and vertical components (vectors)

• What is determined by taking the area under the curve for a velocity versus time graph?Answer: displacement

• What would be the shape of a displacement versus time graph for an accelerating object? Answer: parabola y = kx2

• Answer: a net forceAcceleration is caused by

• Answer: it is 4X biggerWhat happens to the force of attraction between two masses if the distance between them is halved?

• Answer: 49N (equals weight)What is the normal force on a 5.0 kg object sitting on a flat surface?

• Answer: normal force and coefficient of frictionWhat two things determine the frictional force on an object?

• Answer: the sum of all the forces on the object is zero, the net force is zeroWhat must be true for an object to be in static or translational equilibrium?

• What term is used for a force that causes an object to want to rotate?Answer: torque

• In which direction is the net force on an object moving in a circle?Answer: towards the center.

• What must be true for an object to be in rotational equilibrium?Answer: the sum of the clockwise torques have to equal the sum of the counterclockwise torques

• What is the centripetal force of a 1 kg object moving 2 m/s in a circle with a diameter of 2 m? Answer: 4 N

• What is the formula for the rotational inertia of an object revolving around a point?Answer: mr2

• What equation describes the conversion of matter into energy?Answer: E = mc2

• Answer: potentialA compressed spring is an example of what type of energy?

• What three things does gravitational potential energy depend on?Answer: mass, g, height

• What is the kinetic energy of a photoelectron dependent on? Answer: the frequency of the incident light

• Five boxes, each weighing 20 N, are lifted from the floor to a shelf 1.2 m off the ground. How many watts of power are produced if it takes one minute? Answer: 2 W

• What is the numerical value for the speed of radio waves traveling through space?Answer: 3.00 x 108 m/s

• In a given medium, what happens to the wavelength of a sound wave if its frequency doubles?Answer: it is halved

• What is the term used to describe a piano string that is caused to vibrate due to a singers voice?Answer: resonance

• A sound wave resonates in a closed tube that is 20 cm long. What is the wavelength of the sound? Answer: 80 cm (l = 4L)

• What is the speed of light in diamond?Answer: 1.24 x 108 m/s

• What is the total resistance of two 10 ohm resistors connected in parallel?Answer: 5 ohms

• A 10 ohm and 20 ohm resistor are connected in series to a battery. What quantity is the same in both resistors?Answer: the current

• Answer: their quantities of charge and the distance between themWhat is the force between two charged particles dependent on?

• Answer: to prevent excessive current in a circuitWhat is the purpose of a circuit breaker?

• What is the the total current in a circuit with three 10 ohm resistors connected in series to a 12 V battery? Answer: 0.4 A