Given The box crate is being lifted up the plane which is inclined at an...
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Given The box crate is being lifted up the plane which is inclined at an angle using the motor winch M and the cord and pulley arrangement shown on the right The weight Fw of the crate is 500 Lb The surface on which the crate rest is very rough and the coefficient of static friction between the crate and the inclined plane supporting surface is 0 61 For this problem assume that the angle is 26 Kinematics a Label the pulley arrangement and derive the four kinematic equations which describe the crate s motion i e position displacement velocity and acceleration b Find the speed vp at which the cable must be taken up by the motor in order to move the crate up the plane with a speed of 1 ft sec c Find the relative velocity of the point P with respect to point A on the cord that is VPIA if the crate moves up the plane with a speed of 1 ft sec land oy 140 120 100 M
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