Posted by Zee on Sunday, December 18, 2011 at 11:58am.
Please Help. A 5 kg object is propelled from rest at time t=0 by a net force F that always acts in the same direction. The magnitude of F in newtons is given as a function of t in seconds by F= 0.5t. What is the speed of the object at t =4s?

Physics  bobpursley, Sunday, December 18, 2011 at 12:14pm
F=ma
.5t=m a
v= ds/dt
a= dv/dt
v= int a dt= int F/mass dt= INT .5t/m dt
v= 1/4 4^2/m=4/5 m/s check that.