A force of #12# newtons is applied on an object and it gives it an acceleration of #12# #m/s^2#. Find the mass of the object and its velocity after #3# seconds?

1 Answer
Dec 12, 2016

Answer:

Mass of the object is #1.25# #kg.# and its final speed is #36# #m/s#

Explanation:

We assume the object is at rest. As force #F=m×a#, where #m# is mass and #a# is acceleration, both in similar units - like above we have in MKS units.

Hence, mass is #F/a=15/12=5/4# or #1.25# #kg.#.

As the body is assumed to be at rest, its initial velocity #u# is #0# #m/s# and as acceleration is #12# #m/s^2#, final velocity #v# is

#v=u+at=0+12×3=36# #m/s#.