Amotorcycle at a stoplight takes 4.22 seconds to accelerate to 28.0 m/s after thew light turns green. what is its average acceleration

6.64 m/s^2

Explanation:

Average acceleration is defined as follows:

where

v is the final velocity of the object

u is the initial velocity

t is the time taken to accelerate from u to v

In this problem, we have:

(the motorcycle starts from rest)

is the final velocity

is the time taken

Substituting numbers into the formula, we find

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

c) up

hope this