Power - AP Physics 1
Card 1 of 30
Which physical quantity is the rate of doing work?
Which physical quantity is the rate of doing work?
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Power. Power measures how quickly work is performed.
Power. Power measures how quickly work is performed.
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Calculate the power of a machine that does 200 J of work in 10 seconds.
Calculate the power of a machine that does 200 J of work in 10 seconds.
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20 W. Use $P = \frac{W}{t} = \frac{200}{10}$.
20 W. Use $P = \frac{W}{t} = \frac{200}{10}$.
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Which physical quantity is the rate of doing work?
Which physical quantity is the rate of doing work?
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Power. Power measures how quickly work is performed.
Power. Power measures how quickly work is performed.
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Determine the power if a light bulb uses 60 J of energy in 1 second.
Determine the power if a light bulb uses 60 J of energy in 1 second.
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60 W. Energy consumption rate equals 60 joules per second.
60 W. Energy consumption rate equals 60 joules per second.
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Identify the unit equivalent to one watt in terms of basic SI units.
Identify the unit equivalent to one watt in terms of basic SI units.
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1 W = 1 J/s. One watt equals one joule of energy per second.
1 W = 1 J/s. One watt equals one joule of energy per second.
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State the formula for power in terms of energy and time.
State the formula for power in terms of energy and time.
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$P = \frac{E}{t}$. Energy transferred per unit time defines power.
$P = \frac{E}{t}$. Energy transferred per unit time defines power.
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What is the formula for mechanical power in terms of work and time?
What is the formula for mechanical power in terms of work and time?
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$P = \frac{W}{t}$. Work per unit time defines mechanical power.
$P = \frac{W}{t}$. Work per unit time defines mechanical power.
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Calculate the power if a machine does 800 J of work in 4 seconds.
Calculate the power if a machine does 800 J of work in 4 seconds.
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200 W. Use $P = \frac{W}{t} = \frac{800}{4}$.
200 W. Use $P = \frac{W}{t} = \frac{800}{4}$.
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State the unit of power in the International System of Units (SI).
State the unit of power in the International System of Units (SI).
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Watt (W). Named after James Watt, equal to one joule per second.
Watt (W). Named after James Watt, equal to one joule per second.
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Identify the formula for power in rotational motion.
Identify the formula for power in rotational motion.
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$P = \tau \times \frac{d\theta}{dt}$. Torque times instantaneous angular velocity.
$P = \tau \times \frac{d\theta}{dt}$. Torque times instantaneous angular velocity.
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Determine the power if a device uses 150 J of energy in 3 seconds.
Determine the power if a device uses 150 J of energy in 3 seconds.
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50 W. Apply $P = \frac{E}{t} = \frac{150}{3}$.
50 W. Apply $P = \frac{E}{t} = \frac{150}{3}$.
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Calculate the power of a machine that does 200 J of work in 10 seconds.
Calculate the power of a machine that does 200 J of work in 10 seconds.
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20 W. Use $P = \frac{W}{t} = \frac{200}{10}$.
20 W. Use $P = \frac{W}{t} = \frac{200}{10}$.
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What is the equivalent of 1 horsepower in watts?
What is the equivalent of 1 horsepower in watts?
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746 W. Historical unit conversion for mechanical power.
746 W. Historical unit conversion for mechanical power.
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What is the formula for power in terms of force and velocity?
What is the formula for power in terms of force and velocity?
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$P = F \times v$. Force dot product with velocity gives instantaneous power.
$P = F \times v$. Force dot product with velocity gives instantaneous power.
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Identify the power output for a motor that does 4000 J of work in 20 seconds.
Identify the power output for a motor that does 4000 J of work in 20 seconds.
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200 W. Apply $P = \frac{W}{t} = \frac{4000}{20}$.
200 W. Apply $P = \frac{W}{t} = \frac{4000}{20}$.
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What is the formula for instantaneous power using force and velocity vectors?
What is the formula for instantaneous power using force and velocity vectors?
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$P = \textbf{F} \bullet \textbf{v}$. Dot product accounts for force direction relative to velocity.
$P = \textbf{F} \bullet \textbf{v}$. Dot product accounts for force direction relative to velocity.
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Calculate the power if energy of 240 J is used in 4 seconds.
Calculate the power if energy of 240 J is used in 4 seconds.
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60 W. Apply $P = \frac{E}{t} = \frac{240}{4}$.
60 W. Apply $P = \frac{E}{t} = \frac{240}{4}$.
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What is the formula for power in terms of mass, gravity, height, and time?
What is the formula for power in terms of mass, gravity, height, and time?
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$P = \frac{mgh}{t}$. Power to lift mass against gravity over time.
$P = \frac{mgh}{t}$. Power to lift mass against gravity over time.
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Calculate the power if the force is 10 N and the velocity is 5 m/s.
Calculate the power if the force is 10 N and the velocity is 5 m/s.
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50 W. Apply $P = F \times v = 10 \times 5$.
50 W. Apply $P = F \times v = 10 \times 5$.
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What is the formula for power using force, displacement, and time?
What is the formula for power using force, displacement, and time?
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$P = \frac{F \times d}{t}$. Force times displacement per unit time equals power.
$P = \frac{F \times d}{t}$. Force times displacement per unit time equals power.
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Identify the power if 1 kWh of energy is consumed in 1 hour.
Identify the power if 1 kWh of energy is consumed in 1 hour.
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1000 W. One kilowatt-hour consumed in one hour.
1000 W. One kilowatt-hour consumed in one hour.
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Identify the power if 500 J of work is done in 5 seconds.
Identify the power if 500 J of work is done in 5 seconds.
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100 W. Apply $P = \frac{W}{t} = \frac{500}{5}$.
100 W. Apply $P = \frac{W}{t} = \frac{500}{5}$.
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What is the formula for power in terms of energy change and time?
What is the formula for power in terms of energy change and time?
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$P = \frac{\triangle E}{t}$. Change in energy over time interval.
$P = \frac{\triangle E}{t}$. Change in energy over time interval.
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What is the definition of power in physics?
What is the definition of power in physics?
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Rate of doing work or transferring energy. Fundamental definition in terms of work and energy.
Rate of doing work or transferring energy. Fundamental definition in terms of work and energy.
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What is the formula for power in terms of torque and angular velocity?
What is the formula for power in terms of torque and angular velocity?
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$P = \tau \times \frac{d\theta}{dt}$. Rotational power equals torque times angular velocity.
$P = \tau \times \frac{d\theta}{dt}$. Rotational power equals torque times angular velocity.
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Identify the power if 50 J of work is done in 5 seconds.
Identify the power if 50 J of work is done in 5 seconds.
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10 W. Apply $P = \frac{W}{t} = \frac{50}{5}$.
10 W. Apply $P = \frac{W}{t} = \frac{50}{5}$.
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Calculate the power if a force of 10 N moves a body at 3 m/s.
Calculate the power if a force of 10 N moves a body at 3 m/s.
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30 W. Use $P = F \times v = 10 \times 3$.
30 W. Use $P = F \times v = 10 \times 3$.
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Calculate the power if a machine does 800 J of work in 4 seconds.
Calculate the power if a machine does 800 J of work in 4 seconds.
Tap to reveal answer
200 W. Use $P = \frac{W}{t} = \frac{800}{4}$.
200 W. Use $P = \frac{W}{t} = \frac{800}{4}$.
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Determine the power if a light bulb uses 60 J of energy in 1 second.
Determine the power if a light bulb uses 60 J of energy in 1 second.
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60 W. Energy consumption rate equals 60 joules per second.
60 W. Energy consumption rate equals 60 joules per second.
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What is the formula for power in terms of mass, gravity, height, and time?
What is the formula for power in terms of mass, gravity, height, and time?
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$P = \frac{mgh}{t}$. Power to lift mass against gravity over time.
$P = \frac{mgh}{t}$. Power to lift mass against gravity over time.
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