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telo118 [61]
4 years ago
10

If a bar magnet is falling through a loop of wire, the induced current in the loop of wire sets up a field which exerts a force

on the magnet. This force between the magnet and the loop will be attractive when:
Physics
1 answer:
Firlakuza [10]4 years ago
8 0

Answer:

When the magnet is leaving the loop

Explanation:

According to Lenz's law the direction of an induced current in a conductor will oppose the effect which produces it. As the current is induced in the wire loop and force is exerted on the magnet, the force between the magnet and the loop will be attractive when the magnet is leaving the loop because it's is the one that produces the effect which create the current.

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From the edge of a cliff, a 0.46 kg projectile is launched with an initial kinetic energy of 1430 J. The projectile's maximum up
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Answer:

Explanation:

Given

mass of Projectile(m)=0.46 kg

Initial Kinetic Energy=1430 J

Maximum upward displacement from Launch point=150 m

K.E.=\frac{mv^2}{2}

1430\times 2=0.46\times v^2

v=78.85 m/s

and H_{max}=\frac{v^2\sin ^2\theta }{2g}

150=\frac{(78.85)^2\sin ^2\theta }{2\times 9.8}

\sin \theta =0.687

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v_y=54.16 m/s

(c)vertical velocity at any instant=65 m/s

Since initial vertical velocity is 54.16 m/s

so 65 m/s will be acquired when projectile started falling below cliff

v^2-u^2=2 a s

65^2-54.16^2=2\times 9.8\times s

s=65.90 m

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