A bead of mass m-5.00 kg is released from point A and sides on the frictionless

Question

A bead of mass m-5.00 kg is released from point A and sides on the frictionless treck as shown in the figure below. The height of A is ho -7.20m (a) Determine the bead's speed at points B and c point B point C m/s (b) Determine the net work done by the force of gravity in moving the bead from A to C Need Help? Shew My Work (Optional) 9. Question DetaiSeros s1 A worker pushing 350kg wooden crate at a constant tpeed for 9.9 m along a wood nor does 390 magnitude Fo on the crate of work applyre a constant trutre of (a) Determine the value of Fo (b) If the worker now applies a force greater than Fo describe the subsequent motion of the crate (c) Describe what would happen to the crate if the appled force is less than Fo Nead Heip? Show Hy Work (Optional) A horizontal force of 150 N is used to push a 35.0 kg packing crate a distance of find each of the following. 6.50 m on a rough horizontal surface. If the crate moves at constant speed, (a) the work done by the 150 N force (b) the coefficient of kinetic friction between the crate and the surface Show My work (Optional)

Explanation / Answer

a)

Between A and B the change in Potential Energy will get converted to the Kinetic Energy at B

==> mg(hA-hB ) = 0.5*m*v2

==> (2*g*( hA-hB ) )0.5 = v ==> 8.8588 m/s

Similarly for point C,

(2*g*( hA-hC) )0.5 = v ==> 10.1006 m/s

b) Work done by gravity = mgh => 5*9.81*5.2 = 255.0553 Joule

Please post the remaining questions as separate ones.Thanks!!

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