- #1
look416
- 87
- 0
Homework Statement
the diagram shows two bodies X and Y connected by a light cord passing over a light, free-running pulley. X starts from rest and moves on a smooth plane inclined at 30 degrees to the horizontal.
What will be the total kinetic energy of the system when X has traveled 2.0m along the plane?(g=9.8m/s2)
Homework Equations
E=mgh
The Attempt at a Solution
my teacher ask me to find the perpendicular distance of y and x, then use formula E=mgh to find the differences between potential energy between X and Y, and the differences will equal to the total kinetic energy since energy is conserved during the whole motion
BUT, i can't even find the perpendicular distance of X and Y
Homework Statement
A stationary thoron nucleus (A=220, Z=90) emits an alpha particle with kinetic energy Ea. What is the kinetic energy of the recoiling nucleus?
Homework Equations
The Attempt at a Solution
i totally have no idea about it.
Homework Statement
Particles X (of mass 4 units) and Y ( of mass 9 units) move directly towards each other, collide and then separate. If [tex]\lambda[/tex]Vx is the change of the velocity of X and [tex]\lambda[/tex]Vy is the change in velocity of Y, the magnitude of ratio [tex]\frac{\lambdaVx}{\lambdaVy}[/tex]
Homework Equations
The Attempt at a Solution
well the answer state is [tex]\frac{9}{4}[/tex]
but i get [tex]\frac{2}{3}[/tex], just by rationing both magnitude right?
Last edited: