- #1
physics604
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1. The diagram attached shows a 0.010 kg metal rod resting on two long horizontal frictionless rails which remain 0.40 m apart. The circuit has a resistance of 3.0 W and is located in a uniform 0.20 T magnetic field. Find the initial acceleration and maximum velocity for the rod.
a) Initial acceleration: 120 m/s2; maximum velocity: 300 m/s
b) Initial acceleration: 40 m/s2; maximum velocity: 190 m/s
c) Initial acceleration: 120 m/s2; maximum velocity: 190 m/s
d) Initial acceleration: 40 m/s2; maximum velocity: 300 m/s
ε=Blv
ε=Blv
v=[itex]\frac{ε}{Bl}[/itex] = [itex]\frac{15}{0.20×0.40}[/itex] = 187.5 m/s
Now I'm not exactly sure how to find acceleration.
I know the initial v was 0 m/s and the final v was 187.5 m/s. I don't have the length of the rods or anything.
a) Initial acceleration: 120 m/s2; maximum velocity: 300 m/s
b) Initial acceleration: 40 m/s2; maximum velocity: 190 m/s
c) Initial acceleration: 120 m/s2; maximum velocity: 190 m/s
d) Initial acceleration: 40 m/s2; maximum velocity: 300 m/s
Homework Equations
ε=Blv
The Attempt at a Solution
ε=Blv
v=[itex]\frac{ε}{Bl}[/itex] = [itex]\frac{15}{0.20×0.40}[/itex] = 187.5 m/s
Now I'm not exactly sure how to find acceleration.
I know the initial v was 0 m/s and the final v was 187.5 m/s. I don't have the length of the rods or anything.