A 10kg mass is moving in a straight line at a constant speed of 1m/s in space. I stand in front of it, and BAM, it hits me. At what force it hit me?

Question

anonymous · Answer

Constant speed in a straight line means that the velocity is constant, and thus, the net acceleration is zero. Hence, the net force is zero.

anonymous · Answer

my @happytreefriend7 , I understand that there is no force applied to the object, but when the object hits me, what is the force of the impact?

anonymous · Answer

F=dp/dt 
p=mv

initially the object had momentum mv later after hitting it  became 0..so a force was applied on the object to stop it.and by newton's 3rd law a force was applied on you as a 'reaction' force..

the force depends on how much time it took to stop the object..say it took 2 sec to stop the ball..
then average force is |dw:1339827788462:dw| which gives (10*1)/2 = 5 N