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Shkiper50 [21]
3 years ago
5

A boy and his skateboard have a combined mass of 65 kg. What is the speed of the boy and skateboard if they have a momentum of 2

75 kg • ?
Physics
2 answers:
Salsk061 [2.6K]3 years ago
8 0
Speed (s) = momentum (M) : mass (m)

s = 275kg * m/sec : 65 kg ≈ 4,23 m/sec
erma4kov [3.2K]3 years ago
4 0

Answer : The velocity is given by 4.2 m/s.

Explanation :

It is given that,

Mass of a boy and the skateboard is, m = 65 kg

The momentum of the combined system is, p = 275 kg m/s

We know that the momentum of a body is the product of its mass and the velocity with which it is moving.

i.e.

p=m\times v

or

v=\dfrac{p}{m}

v=\dfrac{275\  kg m/s }{65\  kg}

v=4.2\ m/s

The speed of the boy and the skateboard is 4.2 m/s.

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A person can jump 1.5m on the earth. How high could the person jump on a planet having the twice the mass of the earth and twice
MrMuchimi
F=mg=Gm1m2/r^2
g=Gm2/r^2
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A child on a swing sweeps out a distance of 45 ft on the first pass. If she is allowed to continue swinging until she​ stops, an
earnstyle [38]

Answer:

d = 90 ft

Explanation:

Here in each swing the distance sweeps by the swing is half of the initial distance that it will move

So here we can say that total distance in whole motion is  given as

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since it is half of the distance that it will move in each swing so it would be a geometric progression with common ratio of 1/2

so sum of such GP is given by the formula

S = \frac{a}{1 - r}

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6 0
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Imagine you have just witnessed a small avalanche on a mountain while skiing, and two slushy snowballs just crashed together in
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We have that the momentum p is given by the formula p=mv where m is the mass and v is the velocity. Since for A p=-14kgm/s and m=7, we have that the velocity is -14/7=-2m/s. Hence its speed is 2 m/s.
For b we have that p=15kgm/s and v=3m/s. Because m=p/v, we have m=3kg.
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Answer:

Cannot be determined from the given information

Explanation:

Given the following data;

Velocity = 24 m/s

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Mathematically, the amplitude of a wave is given by the formula;

x = Asin(ωt + ϕ)

Where;

x is displacement of the wave measured in meters.

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ω is the angular frequency measured in rad/s.

t is the time period measured in seconds.

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Hence, the information provided in this exercise isn't sufficient to find the amplitude of the waveform.

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