Term
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Definition
W = Fd cosθ area under F vs. d graph |
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Term
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Definition
KE = ½ mv2 ∆KE = ½ mv22- ½ mv12 = ½ m (v22 – v12) ∆KE = Wnet |
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Term
Potential Energy (vertical) (2) Potential Energy (elastic) |
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Definition
PE = Wagainst grav = mgΔy Elastic PE = ½ kx2 |
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Term
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Definition
Spring Force Fspr = -kx (k = spring constant, x = horizontal distance) |
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Term
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Definition
E = KE + PE EMech = ½ mv2 + mgy |
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Term
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Definition
rate work is done work/time or energy/time Fd/time = Fv ∆KE/time |
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Term
| Work done by tension of string on ball spun in a circle? |
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Definition
Zero because the force is perpendicular to the direction of motion, W = Fdcosθ, cos90 = 0 |
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Term
2 blocks (m1>m2) slide on a frictionless surface and then hit a rough spot that slows them to a stop. Which one goes farther? |
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Definition
| Same ΔKE so same work done to them by friction, Ffr is less for m2 so stopping distance is greater. |
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