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2 cards from this section. Quick, good the night before a test.
Define work in physics.
Consider force and distance for calculating work.
What is the unit of energy?
Think about the same units used for work.
What is the definition of work in physics?
Think about the formula W = F * d.
Is momentum always conserved in a collision?
Consider the principle of conservation of momentum.
A 1000 kg car moving at 20 m/s collides elastically with a stationary 1000 kg car. Calculate their final velocities after the collision.
Use conservation of momentum and kinetic energy formulas.
A force of 10 N pushes a box across a floor for 5 meters, then suddenly stops while the box continues to slide for another 2 meters due to inertia. Calculate total work done on the box during its slide.
Consider work done only against friction during the distance you apply force.
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