6.An ordinary workshop grindstone has a radius of 7.00 cm and rotates at 8000 rp

Question

6.An ordinary workshop grindstone has a radius of 7.00 cm and rotates at 8000 rpm.

(a) Calculate the centripetal acceleration at its edge in m/s2 and convert it to multiples of g.

9 An automobile with 0.270 m radius tires travels 70,000 km before wearing them out. How many revolutions do the tires make, neglecting any backing up and any change in radius due to wear?

rev

10.An ordinary workshop grindstone has a radius of 6.50 cm and rotates at 6500 rpm.

(a) Calculate the magnitude of the centripetal acceleration at its edge in m/s2 and convert it to multiples of g.

g

(b) What is the linear speed of a point on its edge?

m/s

11.A hawk flies in a horizontal arc of radius 12.0 m at a constant speed of 3.40 m/s.(a) Find its centripetal acceleration.

m/s2

(b) It continues to fly along the same horizontal arc but increases its speed at the rate of 1.10 m/s2. Find the acceleration (magnitude and direction) under these conditions.

Magnitude          m/s2

Direction             

Explanation / Answer

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