Question 6 (1 point) d The spin-drier of a washing machine slows down uniformly

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Question 6 (1 point) d The spin-drier of a washing machine slows down uniformly from 880 rpm (revolutions per minute) to 260 rpm while making 50 revolutions. Find the angular acceleration through these 50 revolutions. Express your answer in rad/s Question 7 (1 point) You grabbed a power drill that claims it can reach 2253 rpm in 0.8 s. How many revolutions does the drill make in 0.8 s? Question 8 (1 point) A system consists of the following masses loacted in the xy-plane: 5.0 kg at the point (0,5), 7.0 kg at the point (3,8) and 5.0 at the point (-3,-6). Find the distance from the origin to the center of mass. Question 9 (1 point) A uniform solid sphere rolls alonga horizontal frictionless surface at 15 m/s and makes a smooth transition onto a frictionless incline having an angle of 30° How far up the incline does the sphere roll when it comes to a momentary stop? Note for a sphere I- 2/5Mr2, where M is the mass of the sphere and r is the radius of the sphere. Question 10 (1 point) Fred Flintstone's club-ax is made up of two parts: an uniform 3.0 kg stick and a symmetrical 9 kg stone attached to the end of the stick, The dimensions of the club-ax are shown in the figure. How far is the center of mass from the handle end of the club-ax? Express your answer in cm

Explanation / Answer

1) u=880rpm= 92.153 rad/s
v =260rpm= 27.227 rad/s
s=50 revolutions= 314.16 rad
v^2 = u^2 + 2as
(27.227)^2 = (92.153)^2 + 2 * a * 314.16
a= -0.1233 rad/s^2

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