A bicyclist can coast down a 9.0 ∘ hill at a steady 8.5 km/h .The mass of the cyclist plus bicycle is 85.0 kg . If the drag force is proportional to the square of the speed v, so that FD=−cv2. a. Calculate the value of the constant c. b. Calculate the average force that must be applied in order to descend the hill at 27 km/h . Ignore other types of friction.

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Q: A 75.1-kg skydiver reaches a terminal speed of 46.5 m/s with her parachute undeployed. Suppose the…

A: Given : m = 75.1 kg v = 46.5 m/s Fdrag = kv2 g = 9.8 m/s2

Q: The diagram shows a 4kg object accelerating at 10m/s2 on a rough horizontal surface from rest. a)…

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Q: 1. The acceleration due to gravity at a certain level is 9.78 m/s?. This acceleration varies by 8.28…

A: From the question statement, the expression for the acceleration in terms of the height is:

Q: (a) An elevator of mass m moving upward has twoforces acting on it: the upward force of tension in…

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Q: A locomotive accelerates a 25-car train along a level track. Every car has a mass of 5.0 * 104 kg…

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Q: A 74.0-kg skydiver reaches a terminal speed of 59.7 m/s with her parachute undeployed. Suppose the…

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Q: 4. In a physics lab experiment, a 6.00kg box is pushed across a flat table by a horizontal force. a)…

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Q: A 62.9-kg skydiver reaches a terminal speed of 57.0 m/s with her parachute undeployed. Suppose the…

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Q: A 300N wagon is pulled up a 30° incline at constant speed. a. How large a force parallel to the…

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Q: A 52.4-kg skydiver reaches a terminal speed of 63.3 m/s with her parachute undeployed. Suppose the…

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Q: A lamp hangs vertically from a cord in a descending elevator that decelerates at 2.4 m/s2. (a) If…

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Q: A block weighing 80N rests on a plane inclined at 20o to the horizontal. The  coefficient of static…

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Q: acceleration of 7.2 m/s*2, when falling towards the earth. a) How high above the earth's surface is…

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Q: A block with a mass of 3.00 kg starts from rest at the top of a 33.5° incline and slides 2.00 m down…

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Q: A .22-caliber rifle has a 0.470 m long barrel. When fired, a bullet with a mass of 2.50 g…

A: Given: Length of the barrel = 0.470 m Mass of the bullet = 2.50 g Speed of the bullet = 370 ms.

Q: A small diamond of mass 10.0 g drops from a swimmer’s earring and falls through the water, reaching…

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Q: Someone at the other end of the table asks you to pass the salt. Feeling quite dashing, you slide…

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Q: 4) A 200g object falls under gravity from rest through a medium which exerts a frictional drag force…

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Q: A 600 Kg car is moving on a level road at 30 m/s. (a) How large is the retarding force(assumed…

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Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows: