a baseball is hit so that it Chapter 5 Homework s. 0-4 points SerCP10 5P008. My

Question

a baseball is hit so that it Chapter 5 Homework s. 0-4 points SerCP10 5P008. My Notes Ask Yo A block of mass m-2.50 kg is pushed d-2.00 m along a frictionless horizontal table by a constant applied force of magnitude F-12.0 N directed at an angle ·25.0° below the horizontal as shown in the figure below. (a) Determine the work done by the applied force. (b) Determine the work done by the normal force exerted by the table. (c) Determine the work done by the force of gravity. (4) Determine the work done by the net force on the block as 3 0

Explanation / Answer

a) Work done by force = F d * cos theta

= 12 * 2 * cos 25 = 21.75 J

b) normal force = m g + F sin theta

= (2.5 * 9.8) + (12 * sin 25) = 29.57 N

Work done by normal force = 29.75 * 2 * cos 90 = 0 J

c) Work done by force of gravity = 0 J

d) Work done by net forces = 21.75 + 0 + 0

= 21.75 J

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