- #1

- 156

- 10

**Δ1. Homework Statement**

Below

## Homework Equations

[/B]Potential energy = kinetic energy

MgΔY=1/2 mΔv^2

Vf^2=Vi^2+2gx1

## The Attempt at a Solution

For question 49, I used the first equation, and the result is Δv^2=2gY. Then, solving for x1 in the second equation, I got x1=Δv^2 / 2g. Substituting ΔV^2 in x1 results in x1=Y. Answer is A. I am not sure if I should have used H instead of Y, though. But then I would use D, too. I need clarifications, please.

50) since, the masses cancel, the horizontal distance would be the same for M and 2M. Answer C.

51) not sure of it, but friction always slows the motion. So, I guess it is A.

Am I right?