no. 2 only What Is the angular acceleration of the point? iv. What is the angula

Question

no. 2 only

What Is the angular acceleration of the point? iv. What is the angular acceleration at 1 s? v. What is normal, tangential and total acceleration of the point at t 1 s? 2. (10 points) In the Fig. 2 the mass of the block on the table is m 6 kg and a force F 40 N acts on that block. Find the acceleration of the block if coefficient of friction is 0.2. What is the work 3. (10 points) The wooden raft has the thickness 0.3 m, length 5 m and width d done by the net force when block is 3 m away? m Tih

Explanation / Answer

Frictional force f = umg = 0.2*6*9.8 = 11.76 N

By Newton’s second law of motion:

Fnet = ma

=> F – f = ma

=> a = (F-f)/m

= (40-11.76)/6

= 4.71 m/s^2

W = Fnet*d

= (40-11.76)*3

= 84.72 J

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