A car has an initial velocity of 10m/s. It accelerates at a rate of 2m/s2 until it reaches 30m/s. How far does it travel and for how long?

after 10 seconds,  the car reaches 30m/s and travels 200 m

Explanation:

final velocity = initial velocity + acceleration • time

30 m/s = 10 m/s + 2 m/s/s • time

subtract 10m/s from both sides

20 m/s = 2m/s/s • time

divide each side by 2m/s

10 s = time

d = 1/2 acceleration • time^2 + initial velocity • time

d = 1/2 • 2m/s/s • 10s^2 + 10m/s • 10s

d = 1 • 100m  + 100m

d = 200m

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

okay i have so many questions. but the big one here is: um wt..f is this mess? ?