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What can be done to improve the efficiency of a ramp? (1 point)

• Make it shorter and steeper.
• Add a rough surface.
• Smooth the surface.
• Insulate the surface with foam.

3 answers

Smooth the surface.
What is the name of the fixed point about which a lever rotates?
(1 point)
• bar
• fulcrum
• groove
• pulley
Fulcrum
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