Refers to Figure 3, the conveyor belt delivers each 17-kg crate to the ramp at A such %3D that the crate's speed is va = 2.8 m/s, directed down along the ramp. If the coefficient of kinetic friction between each crate and the ramp is uk = 0.3, determine the speed at which each crate slides off the ramp at B. Assume that no tipping occurs. Take 0= 30°. Va IA区 3 m 図図 B. Figure 3

Refers to Figure 3, the conveyor belt delivers each 17-kg crate to the ramp at A such %3D that the crate's speed is va = 2.8 m/s, directed down along the ramp. If the coefficient of kinetic friction between each crate and the ramp is uk = 0.3, determine the speed at which each crate slides off the ramp at B. Assume that no tipping occurs. Take 0= 30°. Va IA区 3 m 図図 B. Figure 3

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.79P: The coefficient of rolling resistance between the 30-kg lawn roller and the ground is r=0.1. (a)...

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3 - In the figure, the 200-lb crate is being pulled up the slope by the motor M. If the velocity of the point P is 2s³ ft/s (where s is the displacement of the crate), and the coefficient of kinetic friction between the crate and the slope is u = 0.2, what will the towing force applied by M be when the box has moved 10 ft up the slope?
A body weighing 445 N is drawn along a rough surface. The force applied in the direction of motion is 135 N while the frictional force is 90 N. if there is an air resistance whose magnitude (in N) is equal to twice the velocity (m/s) at any instant, assume the body to start from rest.Determine the displacement at any time, t.
A 2-ton trailer truck travels down a road with slope 0.2 with a speed of 20 kph. If the truck driver pressed the brakes hard and in that exact time a wind blew with a force of 500 Newtons against the truck, determine how far the tires skid on the road if the coefficient of kinetic friction between the wheels and the road is 0.6.
The lower block of mass m2 = 3.2 kg is pulled on by a rope with a tension force of 28 N. The upper block has mass m1 = 1.8 kg. The coefficient of kinetic friction between the lower block and the surface is 0.32. The coefficient of kinetic friction between the lower block and the upper block is also 0.32. What is the acceleration of the 3.2 kg block?
A spring with spring constant k=70 kN/m is used to stop the box of mass m with initial velocity V1= 7 m/s. The spring is initially compressed 100 mm with cables. Since the box produces a maximum compression x=60 mm in the spring. m= 60 kg. s=750mm(a) Find the kinetic coefficient of friction between the surface and the box.(b) Find the velocity of the box as it moves back from its original position.
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A block of mass m= 2.0 kg is released from rest on an inclined plane at a height of h = 1.5 m. It moves down the rough incline with slope theta= 30.0°and continues on the horizontal frictionless surface. As shown in the figure, there is a spring with negligible mass and force constant k = 300 N/m. The coefficient of kinetic friction between the block and the incline is 0.250 What is the speed of the block when it gets down on the horizontal surface before it touches the spring? The box continues to move on the horizontal surface and compresses the spring. What will be the maximum compression of the spring?
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