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3 years ago

A 5kg rock is lifted 2m. Find the amount of work done.

Physics

1 answer:

lianna [129]3 years ago

5 0

Answer:

98J

Explanation:

Given parameters:

Mass of rock = 5kg

Height = 2m

Unknown:

Work done = ?

Solution:

The amount of work done is given as:

Work done = Force x distance

Work done = Weight x height

Work done = mgH

Now insert the parameters and solve;

Work done = 5 x 9.8 x 2 = 98J

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If a single circular loop of wire carries a current of 61 A and produces a magnetic field at its center with a magnitude of 1.70

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Answer:

The radius is $R = 0.22 5 \ m$

Explanation:

From the question we are told that

The current is $I = 61 \ A$

The magnetic field is $B = 1.70 *10^{-4} \ T$

Generally the magnetic field produced by a current carrying conductor is mathematically represented as

$B = \frac{\mu_o * I}{2 * R }$

=> $R = \frac{\mu_o * I }{ 2 * B }$

Here $\mu_o$ is the permeability of free space with value $\mu_o = 4\pi * 10^{-7} N/A^2$

=> $R = \frac{ 4\pi * 10^{-7} * 61 }{ 2 * 1.70 *10^{-4} }$

=> $R = 0.22 5 \ m$

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3 years ago

Three students are having a conversation. It goes like this. Allison says: "This problem says, can you add a resistor to the cir

notsponge [240]

Answer:

Nima and Natasha are absolutely correct.

Explanation:

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$I=\frac{V}{R}$

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3 years ago

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Here,

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From each object the potential will be

$V_1 = \frac{kq_1}{r_1}+\frac{kq_2}{r_2}$

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