- #1
Hooke's Law
- 30
- 0
Homework Statement
A ball ( 2.7 g ) is launched at a 45 degree angle with a solenoid input of 50V. What is the initial speed of the ball?
Homework Equations
KE = 0.5mv^2
PE = mgh
dy = vy(0)t + 0.5at^2
dx = vx(0)t
The Attempt at a Solution
Voltage is potential energy and I think the mechanical energy is being conserved so:
PE=KE
50 J = 0.5mv^2
sqrt(50 J*2/0.0027 kg) = v
192.5 m/s = v
I believe this speed is wrong, because it is numerically huge. Can someone tell me how to do it?
Thanks