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Kinematics Rotation Energy Waves Electricity 100 200 300 400 500 100 100 100 100 100 200 300 400 500 200 300 400 500 200 300 400 500 500 200 300 400 200 300 400 500 Dynamics & Equilibrium

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### Transcript of KinematicsRotationEnergyWaves Electricity 100 200 300 400 500 100 200 300 400 500 200 300 400 500... Kinematics Rotation Energy Waves Electricity

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Dynamics &Equilibrium What 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? 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? What would be the shape of a displacement versus time graph for an accelerating object?

y = kx2 Acceleration is caused by What happens to the force of attraction between two masses if the distance between them is halved? What is the normal force on a 5.0 kg object sitting on a flat surface? Answer: normal force and coefficient of friction

What 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 zero

What 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? 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? What is the formula for the rotational inertia of an object revolving around a point? What equation describes the conversion of matter into energy? A compressed spring is an example of what type of energy? What three things does gravitational potential energy depend on? 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? What is the numerical value for the speed of radio waves traveling through space? In a given medium, what happens to the wavelength of a sound wave if its frequency doubles? What is the term used to describe a piano string that is caused to vibrate due to a singer’s voice? A sound wave resonates in a closed tube that is 20 cm long. What is the wavelength of the sound?

Answer: 80 cm ( = 4L) What is the speed of light in diamond? What is the total resistance of two 10 ohm resistors connected in parallel? A 10 ohm and 20 ohm resistor are connected in series to a battery. What quantity is the same in both resistors? Answer: their quantities of charge and the distance between them

What is the force between two charged particles dependent on? Answer: to prevent excessive current in a circuit

What 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? 