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2 cards from this section. Quick, good the night before a test.
What is work in a physics context?
Consider both the direction and the amount of force applied.
Is work done when an object is at rest?
Think about the equation W = F·d.
In physics, work is defined as the:
Think about how work is calculated mathematically.
Is work done when a force is applied but there is no movement?
Recall the definition of work in physics.
A person lifts a 10 kg box to a height of 2 m. Calculate the work done against gravity. (g=9.8 m/s²)
Use the formula W = F·d where F = m·g.
A car traveling at 60 km/h applies brakes and slows to 30 km/h in 5 seconds. If the mass of the car is 1200 kg, calculate the work done by the brakes.
Calculate momentum and utilize the work-energy principle here.
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