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Unformatted text preview: madding (cmm3632) – HW05 – markert – (56475) 1 This print-out should have 10 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points A force F is exerted by a broom handle on the head of the broom, which has a mass m . The handle is at an angle θ to the horizontal, as shown below. F θ What is the work done by the force on the head of the broom as it moves a distance d across a horizontal floor? 1. W = F m tan θ 2. W = F d cos θ correct 3. W = F d sin θ 4. W = F m cos θ 5. W = F md sin θ Explanation: By definition, the work done by a force is given by the formula W = vector F · vector d = F d cos θ, where vector d is the displacement vector, and θ is the angle between vector F and vector d . Simply apply the definition, the work is W = F d cos θ . 002 10.0 points A cart loaded with bricks has a total mass of 24 . 1 kg and is pulled at constant speed by a rope. The rope is inclined at 26 . 8 ◦ de- grees above the horizontal and the cart moves 14 . 4 m on a horizontal floor. The coefficient4 m on a horizontal floor....
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