QUESTION 2 A model airplane with mass, m = 0.50 kg is tethered by a wire so that it flies in a circle 0.20 m in radius. The airplane engine provides a net thrust of
0.6 N perpendicular to tethering wire. Find the angular acceleration of the airplane when it is level flight. (Take moment of inertia I = mr2
O a.
12.6 rad/ s2
Ob.0.58 rad/s2
Oc.
5.08 rad/ s
od 6 rad/s?

given data:

determine the horse power (h.p) = ?

force applied to move the box(f) = 10 pounds,

box lifted from a distance         (d) = 3 feet

time taken to lift                         (t) = 10 sec,

the horse power is defined as amount of work required to move a load. the horse power is equal to 550 foot-pound per second

                  1 h.p   = 550 foot-pound/second

it can also be defined as the the load that need to be move a body for certain distance in a certain amount of time.

mathematically,

                      h.p = (force × distance)/ time

                            = (10 × 3)/ 10

                            = 30/10

                            = 3 foot -pound/sec

hence, the horse power is needed to move the box is 3 foot-pound/second

important note: 1 h.p = 550 foot-pound/second = 746 watts