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3 years ago

9

In a simple harmonic motion, when the displacement from the equilibrium position is at its maximum,

1 answer:

Keith_Richards [23]3 years ago

7 0

Answer:

option B

Explanation:

The correct answer is option B

When the displacement in the harmonic motion is maximum then kinetic energy at the maximum point is minimum and the potential energy is maximum at that point.

So, when the displacement is maximum, spring force magnitude is also maximum because the force is proportional to the displacement and also the magnitude of the acceleration is maximum so, the net force is also maximum.

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How much energy must be added to a bowl of 125 popcorn kernels in order for them to reach a popping temperature of 175°C? Assume

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Answer:

c) 3176 J

Explanation:

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= .0125 x 154 x 1650

= 3176.25 J

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3 years ago

At what distance from a long, straight wire carrying a current of 8.7 A is the magnetic field due to the wire equal to the stren

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Answer:

r= 3.2 cm

Explanation:

Given that

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3 years ago

Moving current has electrical energy.

Inessa [10]

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2 years ago

A block of mass 0.500 kg is pushed against a horizontal spring of negligible mass until the spring is compressed a distance x (F

Marrrta [24]

Answer:

Part a)

$x = 0.4 m$

Part b)

$v_i = 11.7 m/s$

Part c)

Speed is more than the required speed so it will reach the top

Explanation:

Part a)

As we know that there is no frictional force while block is moving on horizontal plane

so we can use energy conservation on the block

$\frac{1}{2}mv^2 = \frac{1}{2}kx^2$

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Part b)

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$W_f = -7(\pi \times 1.00)$

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$W_g = - mg(2R)$

$W_g = -(0.500)(9.8)(2\times 1)$

$W_g = -9.8 J$

Now by work energy equation we have

$\frac{1}{2}mv_i^2 + W_f + W_g = \frac{1}{2}mv_f^2$

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Part c)

now minimum speed required at the top is such that the normal force must be zero

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$v = \sqrt{Rg}$

$v = 3.13 m/s$

so here we got speed more than the required speed so it will reach the top

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3 years ago

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castortr0y [4]

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3 years ago