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The conducting bar illustrated in the figure moves on two frictionless, parallel rails in the presence of a uniform magnetic field directed into the page. The bar has mass m, and its length is ℓ. The bar is given an initial velocity v→i to the right and is released at t = 0. (A) Using Newton's laws, find the speed of the bar as a function of time after it is released.

The conducting bar illustrated in the figure moves on two frictionless, parallel rails in the presence of a uniform magnetic field directed into the page. The bar has mass m, and its length is ℓ. The bar is given an initial velocity v→i to the right and is released at t = 0. (A) Using Newton's laws, find the speed of the bar as a function of time after it is released.

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The conducting bar illustrated in the figure moves on two frictionless, parallel rails in the presence of a uniform magnetic field directed into the page. The bar has mass m , and its length is ℓ . The bar is given an initial velocity v → i to the right and is released at t = 0 . (A) Using Newton's laws, find the speed of the bar as a function of time after it is released.

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A metal bar with length L, mass m, and resistance R is placed on frictionless metal rails that are inclined at an angle ϕ above the horizontal. The rails have negligible resistance. A uniform magnetic field of magnitude B is directed downward in the figure (Figure 1). The bar is released from rest and slides down the rails. Figure 1 of 1 Part A Is the direction of the current induced in the bar from a to b or from b to a ? from a to b from b to a Submit Request Answer Part B What is the terminal speed of the bar? Express your answer in terms some or all of of the variables R, m, ϕ, L, B, and acceleration due to gravity g. vt = Submit Request Answer Part C What is the induced current in the bar when the terminal speed has been reached? Express your answer in terms some or all of of the variables R, m, ϕ, L, B, and acceleration due to gravity g. 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