Question: Find the net torque on the wheel in Figure P10.27 about the axle through , taking and .
The net torque on the wheel about the axle through O taking and is .
The force that makes an object rotate is a torque.
Consider the given figure.
Find the torque for 10.0N.
Since the radius of the torque 10N is b.
Thus, the torque rotates in clockwise direction.
Calculate the torque for 9.00N.
Let the radius of 9.00N is b,
, rotates in clockwise direction.
Determine the torque for
Since it has an angle, the force is perpendicular.
Thus, the radius is from the figure,
Substitute the following values:
It rotates in anticlockwise direction.
Hence, the total torque can be calculated as
Therefore, the net torque exerted on the wheel is .
Question: A car accelerates uniformly from rest and reaches a speed of 22.0m/s in 9.00s. Assuming the diameter of a tire is 58.0cm, (a) find the number of revolutions the tire makes during this motion, assuming that no slipping occurs. (b) What is the final angular speed of a tire in revolutions per second?
A particle of mass 0.400Kg is attached to the 100cm mark of a meterstick of mass 100Kg . The meterstick rotates on the surface of a frictionless, horizontal table with an angular speed of 4.00rad/s. Calculate the angular momentum of the system when the stick is pivoted about an axis (a) perpendicular to the table through the mark 50.0cm and (b) perpendicular to the table through the 0cm mark.
Big Ben Fig. the Parliament tower clock in London, has hour and minute hands with lengths of 2.70 m and 4.50 m and masses of 60.0 kg and 100 kg, respectively. Calculate the total angular momentum of these hands about the centre point.(You may model the hands as long, thin rods rotating about one end. Assume the hour and minute hands are rotating at a constant rate of one revolution per12 hours and 60 minutes, respectively.)
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