D. have the same shape
13. The region around a magnet where the magnetic force is exerted is known
ed is known as its
a. magnetic pole
b. lodestone
c. magnetic field
d. magnetic domain
14. One part of a freely swinging magnet always points
a. east
b. to Earth's geographic north pole
c. toward Earth's core
d. to Earth's magnetic pole in the Northern Hemisphere
Electricity and Magnetism
Nitty Gritty Science, LLC ©2016

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