need help ASAP for question 3 Question 2 You are fwing your bike and test our th

Question

need help ASAP for question 3

Question 2 You are fwing your bike and test our the motion of the whels whle tis upside down You spointhe o210 m radius tireand seea times per second. What is the dirt's acceleration if it is moving in uniform circular motion? and see a piece of dirt on the tireg 188 m/s2 O 4.76 m/s2 O8.29 m/s2 0.210 m/s? Question 3 A record is spinning around on a record player and has a period of 2.00 s. The record has a diameter of 29.1 cm. tbegins to slow down and it stops after 8.00 s How many revolutions does the record make between the record starting to slow down and coming to a complete stop? 2.00 rev 112 rev 12.6 rev () 6.00 rev

Explanation / Answer

Time Period for record player is 2 secs.

Diameter of Record = 29.1 cm

that means radius = 14.55cm

circumference of wheel = 2*pi*r= 2*3.14*14.55= 91.374cm

then lets calculate angular velocity made by dividing via 8sec which it took to stop= 91.374/8=11.42 rad/s(w= 2*pi*r*/T)

As period is given Revolutions N will be known i.e 11.42/2= 5.71 =6 revolutions(approx)

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