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solong [7]
3 years ago
7

A 52 kg child on a swing is travelling at 6 m/s . What is his gravitational potential energy if he has 1000 J of the mechanical

energy?
Physics
1 answer:
DiKsa [7]3 years ago
7 0

Answer:

The correct answer is "64 J".

Explanation:

The given values are:

Mass,

m = 52 kg

Velocity,

v = 6 m/s

Mechanical energy,

= 1000 J

Now,

The gravitational potential energy will be:

⇒ P.E=1000-\frac{1}{2}mv^2

           =1000-\frac{1}{2}\times 52\times (6)^2

           =1000-26\times 36

           =1000-936

           =64 \ J

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A particle with mass 1.81*10^-3kg and a charge of 1.22*10^-8C has, at a given instant, a velocity v= (3.0*10^4 m/s)j.
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Answer:

a = -0.33 m/s² k^

Direction: negative

Explanation:

From Newton's law of motion, we know that;

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We are given;

m = 1.81 × 10^(−3) kg

q = 1.22 × 10 ^(−8) C

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Thus, since we are looking for acceleration, from, ma = qVB; let's make a the subject;

a = qVB/m

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a = -0.33 m/s² k^

7 0
3 years ago
If you separate vector B into its components. How many components will it have? Those components will be called?
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The vector B will have two components and those components will be called resultant vectors.

<h3>What is a component vector?</h3>

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6 0
3 years ago
If a basball is project upwards from the ground level with an initial velovaity of 32 feet per second, then it's height is a fun
inessss [21]

Answer:

Maximum height reached by the ball is 32 meters.

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