1.3_ 1405_Ramps

1.3_ 1405_Ramps - Clicker Question A ramp makes lifting a...

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1 Phy 1405 1 Key Concepts: 1. Newton’s 3 rd Law 2. Support Force 3. Work 4. Energy Phy 1405 2 Clicker Question A ramp makes lifting a box easier because… A) You can use less energy to lift the box B) The ramp exerts some force on the box C) A ramp lets you use wheels Phy 1405 3 Lifting an object straight up is often difficult Pushing the object up a ramp is usually easier The ease depends on the ramp’s steepness Shallow ramps require only gentle pushes You seem to get something for nothing Observations About Ramps Phy 1405 4 4 Questions about Ramps Why doesn’t the cart fall through the ramp? Are both cart and ramp pushing on each other? Why is it easier to push the cart up a ramp? Is there a physical quantity that’s the same for any trip up the ramp, regardless of its steepness?
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