Ameteorite has a speed of 80.0 m/s when 900 km above the earth. it is falling vertically (ignore air resistance) and strikes a bed of sand in which it is brought to rest in 3.20 m .

Part a)

Part b)

Part c)

Part d)

Explanation:

Part a)

As we know that total mechanical energy of the meteorite must be conserved

so we will have

Part b)

Work done by sand to stop it

Part c)

As we know that

W = F. d

so we have

Part d)

Work done = thermal energy

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

its a 5.5 n

glad that