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3 cards from this section. Quick, good the night before a test.
Define work in physics.
Think about how force and movement are related.
If a 5 N force moves an object 3 meters, how much work is done?
Use the formula W = F × d.
What is the SI unit of work?
Consider the relationship of work to energy.
True or False: The work done is positive if force and displacement are in opposite directions.
Think about how direction affects energy transfer.
A person carries a box up a 3 m height with a constant force of 50 N at an angle of 30 degrees to the vertical. Calculate the work done against gravity.
Remember to consider how only the vertical component of the force does work against gravity.
A cart moves 20 m down a ramp that is inclined at 15 degrees. Calculate the work done by gravity if the mass of the cart is 5 kg.
Determine how far the cart moves vertically down.
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