3 years ago

Which example is a naturally occurring magnet

Physics

1 answer:

nikitadnepr [17]3 years ago

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The answer should be D) Earth or the fourth option.

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A boy whirls a stone in a horizontal circle of radius 1.4 m and at height 1.5 m above ground level. The string breaks, and the s

balandron [24]

Answer: $233.23 m/s^2$

Explanation:

Given

radius of circle=1.4 m

Height of stone above ground=1.5 m

Horizontal distance(R)=10 m

It is given at the time of break stone flies horizontally thus stone to cover a height of 1.5 m in time t before reaching ground

$1.5=0+\frac{gt^2}{2}$

t=0.55 s

Initial horizontal velocity at the time of break is given by u

$R=u\times t$

$10=u\times 0.55$

u=18.07 m/s

Therefore magnitude of centripetal acceleration is given by

$a_c=\frac{u^2}{r}=\frac{18.07^2}{1.4}=233.23 m/s^2$

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2 years ago

How can you tell if something has a lot of kinetic energy? How can you tell if something only has a little bit of kinetic energy

dezoksy [38]

Based on the equation KE = 1/2(m)(v^2), Kinetic Energy can be measured based on velocity. If an object has a large velocity, it have a larger kinetic energy than if the velocity is small.

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3 years ago

If light travels from oil (slower medium) to water (faster medium) at an angle, what happens to the direction of the light ray i

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If light travels from oil to water at an angle, what happens to the direction of the light ray in water with respect to the normal, is it moves away from the normal.

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A 20 N force is applied to an object causing it to move 10 m. How much work was done on the object? How much energy was needed t

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Here, force=20N and displacement=10m

Work=Force×Displacement=20N×10m=200Nm

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