1. A ceiling fan is turned on and a net torque of 1.8 N · m is applied to the bl
ID: 1795909 • Letter: 1
Question
1. A ceiling fan is turned on and a net torque of 1.8 N · m is applied to the blades. The blades have a total moment of inertia of 0.20 kg · m2. What is the angular acceleration of the blades?
rad/s2
2. The wheels, axle, and handles of a wheelbarrow weigh W = 66.5 N. The load chamber and its contents weigh WL = 637 N. The drawing shows these two forces in two different wheelbarrow designs. To support the wheelbarrow in equilibrium, the man's hands apply a force to the handles that is directed vertically upward. Consider a rotational axis at the point where the tire contacts the ground, directed perpendicular to the plane of the paper. Find the magnitude of the man's force for both designs.
(a) F =
(b) F =
Explanation / Answer
1.
Net torque is given by:
Net torque = Moment of inertia*angular acceleration
T = I*alpha
alpha = T/I
using given values:
alpha = 1.8 N-m/(0.2 kg-m^2)
alpha = 9 rad/sec^2
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.