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diamong [38]
3 years ago
7

A child on a swing falls a height of 1m. What speed will the child reach?

Physics
1 answer:
kirill [66]3 years ago
7 0

Answer:v=4.42\ m/s

Explanation:

Given

Child falls a height of h=1\ m

Applying conservation of energy  we can write

Loss in Potential energy=Gain in kinetic energy

mgh=\frac{1}{2}mv^2

v=\sqrt{2gh}

v=\sqrt{2\times 9.8\times 1}

v=\sqrt{19.6}

v=4.42\ m/s

Thus child reaches a velocity of 4.42 m/s

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Answer:

see below

Explanation:

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3 0
3 years ago
Calculate the lateral displacement of a ray of light incident at an angle of 30o on a parallel – sided block of glass of thickne
OLga [1]
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2 years ago
A 100 N force is applied to move an object a horizontal distance of 5 meters at constant speed in 10 seconds. How much power is
Tpy6a [65]

Answer:

50 W

Explanation:

<h3><u>Given :</u></h3>

  • Force applied = 100 N
  • Distance covered = 5 metres
  • Time = 10 seconds

<h3><u>To find :</u></h3>

Power

<h3><u>Solution :</u></h3>

For calculating power, we first need to know about the work done.

\bf \boxed{Work = Force \times displacement}

Now, substituting values in the above formula;

Work = 100 × 5

= 500 Nm or 500 J

We know that,

\bf \boxed{Power=\dfrac{Work\:done}{Time\: taken}}

Substituting values in above formula;

Power = 500/ 10

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Answer:

<em>In physics, energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object. Energy is a conserved quantity; the law of conservation of energy states that energy can be converted in form, but not created or destroyed.</em>

<em />

<em>In physics, energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object. Energy is a conserved quantity; the law of conservation of energy states that energy can be converted in form, but not created or destroyed.</em>

Explanation:

<h2><u><em>HOPE THIS HELPS</em></u></h2>
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pickupchik [31]
The answer is ultraviolet rays

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