- #1
khem student
- 7
- 0
Homework Statement
Three identical blocks connected by ideal strings are being pulled along a horizontal frictionless surface by a horizontal force. The masses of the three blocks are 15.1kg , 19.8kg , and 36.0kg , Answer the following questions concerning the motion of the blocks.
1. If the blocks move across the horizontal frictionless surface with a constant velocity of 2.5 m/s, what is the horizontal force?
What I don't understand is that the blocks are listed as Identical but all vary in weight.
Homework Equations
Image is attached.
The Attempt at a Solution
I know Force = mass * gravity otherwise known as 9.81 m/s^2
and I know that if I divide the velocity 2.5 m/s by time it will = mass
I know time= distance/velocity, but no distance is given, so what formula do I use to solve for horizontal force in this situation?
Typically A=B,B=C,C=A if they are all identical blocks, but here the weights vary among the blocks so how would that be taken into account.
The prof tends not to explain the process and just assigns the work...