kelaunchpp?course assessment-id»-229976-1&course;C\" a search QUESTION 3 A 8-kg

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kelaunchpp?course assessment-id»-229976-1&course;C" a search QUESTION 3 A 8-kg block is set moving with an initial speed of 6 m/s on a rough horizontal surface. If the force of friction is 12 N, approximately how far does the block travel before it stops? The only force acting is the totion and use one the kinematic equations) QUESTION 4 A muscle builder holds the ends of a massless rope. At the center of the rope, a 7.9-kg ball is hung as shown a) Draw the free body diagram ofthe blank sheet b)Determine the tension in the rope if the angle in the drawing is 60 QUESTION S Cliok Save and Subenit to save and submit, Ciek Save All Anncers to save all anvers Saw All Answers hp 5

Explanation / Answer

Question-3)

Given,

m = 8 kg ; v = 6 m/s ; Ff = 12 N

Since the only force is acting is the frictional force, so the block will stop when it has no further energy to over come the frictional forces.

from conservation of energy

KE = Work done by the frictioanl forces

1/2 m v^2 = Ff d

d = 1/2 m v^2/Ff

d = 0.5 x 8 x 6^2/12 = 12 m

Hence, the block travels d = 12 m before it stops.

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