ASSIGNMENT No. ( 6 )

# ASSIGNMENT No. ( 6 ) - Edited by Foxit Reader Copyright(C...

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ASSIGNMENT No. ( 6 ) KINETICS OF A PARTICLE PRINCIPLE OF WORK AND ENERGY 1. The 100–kg crate is subjected to two forces F 1 and F 2 as shown. If it is originally at rest , determine the distance it slides in order to attain a speed of v = 6 m / s. The coefficient of kinetic friction between the crate and the surface is μ = 0.2 . 2. The 2–kg block is subjected to a force having a constant direction and a magnitude which is given by F = 300 / ( 1 + s ) N, where s is in meters .When s = 4 m, the block is moving to the right with a speed of 8 m / s . Determine its speed when s = 12 m. The coefficient of kinetic friction between the block and the ground is μ = 0.25 . 3. The conveyor belt delivers each 12-kg crate to the ramp at A such that the crate` s velocity is v A = 2.5 m / s, directed down along the ramp. If the coefficient of kinetic friction between each crate and the ramp is μ = 0.3 , determine the speed at which each crate slides off the ramp at B. Assume that no tipping occurs. ° 30

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