Question

A wheel passes 600 pi cm for 10 rotations. What is the radius of the wheel?
​

Answer 1

Answer:

Answer

Open in answr app

Open_in_app

Radius r=1.5m,α=10rad/s

2

initial angular speed w

0

=

π

60

rpm

=2π×

π

60

×

60

1

rad/s

=2rad/s

Time t=2s

From rotational kinematics

w=w

0

+αt

2+10×2

=2+20

=22rad/s

and θ=w

0

t+

2

1

αt

2

=2×2+

2

1

×10×4

=4+20

=24rad

Answer 2

Answer:

We illustrate the precession of a gyroscope with an example of a top in the next two figures. If the top is placed on a flat surface near the surface of Earth at an angle to the vertical and is not spinning, it will fall over, due to the force of gravity producing a torque acting on its center of mass