Solutions for Tutorial 7

# Solutions for Tutorial 7 - 25 = b = − − ⇒ = ∑ w F F...

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Phys 1L03 Tutorial session Set 7 Key: Answers and some hint for set 7 problems 1. θ τ sin r F = a. o 90 = m N . 5 . 58 = b. o 43 = m N . 9 . 39 = c. o 0 = 0 = 2. m N r F . 75 . 46 sin = = 3. Load Effort Force = , sin r F = N F 7 . 6 2 . 1 / 8 = = 4. m N m N . 10 84 . 7 . 784 2 × = = 5. Door Trape Rope = sin r F = Nm Rope 4 . 57 = . 4 . 57 clockwise is It Nm Door Trape = 6. Force Load = sin r F = Nm Load 2 . 235 = m F Force 4 . 2 = N F 98 = . Lever the to lar perpendicu be to assumed are Force and Load Both 7. Also, solve this problem considering the weight of board is 250 N. (Do it at home.) 0 = N F 200 = 8. Respect to elbow: a. CCW CW net net ) ) = 1 3 2 r w r w r F b a B + = N F B 470 = b. 38 . 7 7 . 63 470 = = + b a B w w F c. 0 0 = = b a E B w w F F F N F E 406 = 9. a. Respect to pivot: CCW CW net net ) ) = N F M
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Unformatted text preview: 25 = b. = − − ⇒ = ∑ w F F F M j N F j 25 = 10. a. Respect to pivot point: CCW CW net net ) ) = N F A 3 10 21 . 2 ) ( × = b. = + − ⇒ = ∑ N F F F p A N F p 3 10 94 . 2 × = 11. CCW CW net net ) ) = d mg r F wind ) ( = N F wind . 11 = 449 . = w F wind...
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