Forces Il Begin Date: 9/122016 12.00:00 AM-Due Date: 9/26/2017 8:0000 AM End Dat

Question

Forces Il Begin Date: 9/122016 12.00:00 AM-Due Date: 9/26/2017 8:0000 AM End Date: 12/15/2017 11 5900 PM (5%) Problem 12: A block with mass m-11 kg is strking with constant acceleration ar= 0.75 m/s2 tnto the level ground The free-fall acceleration ts g 9 81 ms Please answer the following questions Otheesperta.com 14% Part (a) write an expression for the magnitude of the force of grasty on the block, Fe n terms of the given quantities and variable available in the palette Potential 100% 4 5 6 Submissions ar Fy Hint Hints: deductaon per hat Hints remaining: Feedback:deduction per feedback -" 14% Part (h) Calculate the magnitude of the force of gravity on the block. F, in New 14% Part (c) In what direction does the force of gravity act?' 14., Parq (d) write an expression for the magnitude of the total force ofthe systemun the 2 direction, Ft in terms ofthe forces or ed = ed 14% Part (e) Write an espression for the magnitude of the normal force Foun terns ofm, at, and g &14% Part (0 What is the magnitude of the normal force in N? 14% Part (g) In what direction is the normal force ed

Explanation / Answer

(a) Force of gravity on the block, Fg = m*g

(b) Magnitude of Fg = 11*9.81 = 107.91 N

(c) Froce of gravity acts in the downward direction.

(d) Normal force, F = m* g - m*a(T)

(e) Magnitude of normal force, F = 11*9.81 - 11*0.75 = 107.91 - 8.25 = 99.66 N

(f) Normal force shall act in the upward direction.

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