Serway_CP_poll_ch08

# Serway_CP_poll_ch08 - A woman who weighs 500 N is standing...

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A woman who weighs 500 N is standing on a board that weighs at the right end is 3 times bigger than the support force at the left end. If the board is 8 m long, how far from the right end is the woman standing? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 4.0 m 2. 2.0 m 3. 2.7 m 4. 1.6 m

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in 6 s. The wheels have a diameter of 0.4 m. What is the angular acceleration of each wheel? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 5 rad/s 2 2. 15 rad/s 2 3. 25 rad/s 2 4. 35 rad/s 2
(I cylinder = 1/2 MR 3 ). If the bus requires an average power of 10 kilowatts, how long will the flywheel rotate? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 308 s 2. 617 s 3. 925 s 4. 1234 s

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and supported by vertical ropes at each end. How far would the worker stand from one of the supporting ropes to produce a tension of 550 N in that rope? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 1.4 m 2. 2.0 m 3. 2.5 m 4. 2.7 m
is resting against a smooth, frictionless wall. If the ladder is 20 kg and it makes an angle of 60° with the ground, find the force of friction of the ground on the foot of the ladder. 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 784 N 2. 196 N 3. 50 N 4. 138 N

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and floor is 0.40, what is the maximum angle that the ladder can make with the floor before it slips? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 22° 2. 51° 3. 18° 4. 42°
and 80 cm marks, respectively. Where should a third mass of 0.30 kg be hung to keep the stick balanced? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 20 cm 2. 70 cm 3. 30 cm 4. 25 cm

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An 800 N billboard worker stands on a 4 m scaffold weighs 500 N and the worker stands 1 m from one end, what is the tension in the rope nearest the worker? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 450 N 2. 500 N 3. 800 N 4. 850 N
A 20 kg child wants to use a 10 kg board that is 4.0 m long as a herself by putting the support at the center of gravity when she sits on one end of the board. How far from her will the support point be? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 2.0 m 2. 1.0 m 3. 0.67 m 4. 0.33 m

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circling the ship with an angular velocity of 0.1 rad/s. How far can she be pulled in before the centripetal acceleration reaches 5g = 49 m/s 2 ? 1 2 3 4 25% 25% 25% 25% 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1. 10.1 m 2. 50.0 m 3. 72.7 m 4. 89.9 m
a force of 300 N directed perpendicular to the plane of the door and 0.8 m from the hinges. What is the torque due to this force about an axis through the hinges?

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## This note was uploaded on 01/19/2010 for the course PHYS 200 taught by Professor Davies during the Spring '08 term at Roger Williams.

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Serway_CP_poll_ch08 - A woman who weighs 500 N is standing...

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