Exploring Work and Power Concepts

This video tutorial covers the concepts of work and power, explaining how energy is transformed and calculated. It introduces the units of measurement, such as joules and watts, and provides examples of calculating work and power, including scenarios where force is applied at an angle. The tutorial also discusses the relationship between force, distance, and time in these calculations.

What is the unit of work in the MKS system?

• Watt

• Joule

• Meter

• Newton

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If a force of 50 newtons is applied to move an object 6 meters, how much work is done?

• 0 Joules

• 6 Joules

• 300 Joules

• 50 Joules

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What happens to the work done if the object does not move, regardless of the force applied?

• Work is negative

• No work is done

• Work is halved

• Work is doubled

How is power defined in relation to work and time?

• Power is work divided by time

• Power is force divided by distance

• Power is work multiplied by time

• Power is force multiplied by distance

A student lifts a book with a force of 10 newtons to a height of 3 meters. How much work is done?

• 10 Joules

• 30 Joules

• 3 Joules

• 0 Joules

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If a force of 50 newtons is applied but the object does not move, how much work is done?

• 50 Joules

• 0 Joules

• 100 Joules

• 25 Joules

When force is applied at an angle, which component of the force is used to calculate work?

• The horizontal component

• The vertical component

• None of the above

• The entire force

A car does 2450 joules of work in 8 seconds. What is its power output?

• 3060 Watts

• 8 Watts

• 2450 Watts

• 306 Watts

Joe climbs a flight of stairs in 15 seconds. If his weight is 850 newtons and the height of the stairs is 10 meters, what is his power output?

• 567 Watts

• 850 Watts

• 10 Watts

• 15 Watts

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How much force is required to move an object 25 meters in 6 seconds with a power output of 50 watts?

• 6 Newtons

• 12 Newtons

• 25 Newtons

• 50 Newtons

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