A stationary object of mass 4kg is set by a net force of 50N. If the object attains a speed of 5m/s in time, what is the time ?

1 Answer
Feb 22, 2018

#0.4 s#

Explanation:

As the object is moving under constant force,we can apply the equation, #v=u+at# where, #v# is the velocity attained after time #t# which had an initial velocity of #u#

Now, acceleration #a =F/m=50/4=12.5 ms^-2#

Given, #u=0#

So, if #v=5# then, #t=5/12.5=0.4s#