Author Question: A potter's wheel, with rotational inertia 46 kgm2, is spinning freely at 40 rpm. The potter drops a ... (Read 161 times)

mynx · **on:** Jul 29, 2018

A potter's wheel, with rotational inertia 46 kgm2, is spinning freely at 40 rpm. The potter drops a lump of clay onto the wheel, where it sticks a distance 1.2 m from the rotational axis.

If the subsequent angular speed of the wheel and clay is 32 rpm what is the mass of the clay? A) 8.0 kg
B) 5.4 kg
C) 7.0 kg
D) 8.8 kg

Question 2

A uniform solid sphere of mass 1.5 kg and diameter 30.0 cm starts from rest and rolls without slipping down a 35 incline that is 7.0 m long. (a) Calculate the linear speed of the center of the sphere when it reaches the bottom of the incline.

(b) Determine the angular speed of the sphere about its center at the bottom of the incline. (c) Through what angle (in radians) does this sphere turn as it rolls down the incline? (d) Does the linear speed in (a) depend on the radius or mass of the sphere? Does the angular speed in (b) depend on the radius or mass of the sphere?

zoeyesther · **Reply #1 on:** Jul 29, 2018

Answer to Question 1

A

Answer to Question 2

(a) 7.5 m/s (b) 50 rad/s (c) 47 rad
(d) The linear speed depends on neither the radius nor the mass of the sphere. The angular speed depends on the radius of the sphere.