Wednesday

April 23, 2014

April 23, 2014

Posted by **trevor** on Wednesday, January 16, 2013 at 4:18am.

(1)determine the particle's speed at points B and C.

(2)determine the net work done by the force of graviy in moving the sphere from point A to C

- science -
**Elena**, Wednesday, January 16, 2013 at 6:10amΔPE(A)=ΔKE(C)

mgΔh₁= mv(C)²/2

v(C)=sqrt(2gΔh)=

=sqrt{2•9.8•(5-2)}=7.67 m/s

KE(C) =KE(B) + Δ PE(B)

mv(C)²/2 =mv(B)²/2+ mgΔh₂

v(C)² = v(B)² + 2gΔh₂

v(B)=sqrt{ v(C)² -2g(3.2-2)} = …

W= mgΔh₁=…

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