skier moves down a 12° slope at constant speed. What can you say about the coefficient of friction, Assume the speed is low enough that air resistance can be ignored.
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A skier moves down a 12° slope at constant speed. What can you say
about the coefficient of friction, Assume the speed is low enough that air
resistance can be ignored.
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- A skier starts from rest and slides downhill. What will be the speed of the skier if he drops 35 centimeters in vertical height? Ignore any air resistance ( which will in reality be quite a lot) and any friction between the skis and the snowA 1 kg ball moving horizontally to the right at 12m/s strikes a 10kg block placed at rest at an inclined plane, which makes an angle of 25 degrees with the horizontal. The coefficient of restitution is 0.60 and the coefficient of kinetic friction between the block and the inclined surface is 0.40. What is the velocity of the block after impact? What is the velocity of the ball after impact?A block having a mass of 50 kg is subjected to a horizontal force applied 0.5 m. above the horizontal surface causing it to have an acceleration of 1m/s2. If the coefficient of friction between the block and the horizontal surface is 0.40. Find the horizontal force. Find the distance traveled after 10 sec. if it has an initial velocity of 5 m/s. c. Find the velocity after 5 sec.
- A box slides from rest at point A down an inclined 30 degrees to the horizontal. After reaching the bottom of the plane, the box moves on a horizontal floor at a distance 2m before coming to rest. Coefficient of friction between the box and the floor is 0.40 a. What is the distance from point A to the intersection of the inclined plane and the horizontal floor? b. What is the velocity of the block as it reaches the intersection of the inclined plane and the horizontal floor? c. What is the total time of travel until it stop?Block B rests upon a smooth surface. If the coefficients of static and kinetic friction between A and B are us= 0.4 and uk = 0.3, respectively, determine the acceleration of each block if P = 10 lb. Show your complete, detailed, and complete solution. Thank you.An old pipe of diameter 2.5” is carrying water at a velocity of 4 ft/s. Determine the Reynolds number of the flow and the friction factor of the pipe if the length of pipe is 200ft and the kinematic viscosity of water is 0.98x10-6 ft2/s.
- A 1800 kg car traveling up on inclined 8% grade at a rate of 60 kph Was brought to rest after traveling 75 m. The wheels are 3 m apart. It’s center of gravity is at Midway of the wheels and 500 mm from the ground surface. Assume friction or assistance act at the rear wheels. a. deceleration of the car b. normal reaction acting on the front wheel c. Coefficient of friction between road service and tire.Civil Engineering Q)If the horse power 107.1 hp produced by a passenger car traveling at a speed of 84 mi/h on a straight road of 6% grade with a smooth pavement.(Find the rolling / curve/ air/ grade)resistance ?(Note : Assume the cross-sectional area of the car is 45 ft2)A 1800 kg car traveling up an inclined 8% grade at a rate of 60kph and was brought to rest after traveling 75m. The wheels are 3m apart. Its center of gravity is at midway of the wheels and 500mm from the ground surface. Assume frictional resisitance act at the rear wheels. Find:a) decceleration of the carb) normal reaction acting on the front wheelc) coefficient of friction between road surface and tire
- The 40-kg crate is placed on the top of the step of an escalator. If the static coefficient of friction between the crate and step is 0.4, determine the largest acceleration a of the escalator for which the crate would not slip. Assume that the direction of the acceleration is (a) up and (b) down.Determine the horsepower produced by a passenger car traveling at a speed of 65 mi/h on a straight road of 5% grade with a smooth pavement. Assume the weight of the car is 4000 lb and the cross-sectional area of the car is 40 f t 2.A medicine ball weighing 1lb is dropped from 2500 ft. with no velocity. As it falls, air resistance is equal to v/8 in pounds where v is the velocity of the ball is feet per second. Find the limiting velocity and the time it takes for the ball to hit the ground.