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kotykmax [81]
3 years ago
14

5) A moving 2 kg object has an initial velocity of 10 m/s. It comes to a stop on a rough

Physics
2 answers:
umka2103 [35]3 years ago
4 0

Answer:

a) kinetic energy=0.5×mass×speed²

kinetic energy=0.5×2×10²=100 joules

Explanation:

im not sure about the rest :(

beks73 [17]3 years ago
4 0

Answer:

a) 100J

b)20N

c) 100J

Explanation:

A) KE = 0.5 x mass x velocity^2

= 0.5 x 2 x 10^2

= 100 J

B) Work done = Force x distance

Since work done = energy transferred

Energy transferred = Force x Distance

Energy transferred/ Distance = Force

100/5 = 20 N

C) Let's assume that all the Kinetic energy of the subject get's transferred into heat energy

Therefore Kinetic energy = Heat energy = 100 J

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The momentum before the collision velocity after the collision will be 1237.6 kg m/s² and 6.8 m/sec.

<h3>What is the law of conservation of momentum?</h3>

According to the law of conservation of momentum, the momentum of the body before the collision is always equal to the momentum of the body after the collision.

The given data in the problem is;

(m₁) is the mass of hockey player 1= 91.0-kg

(m₂) is the mass of hockey player 2=  91.0-kg

(u₁) is the velocity before collision of hockey player 1 = 5.50 m/s.

(u₂) is the velocity before the collision of hockey player 2=?

a)

Momentum before the collision;

\rm  m_1u_1 + m_2u_2 \\\\ 91.0 \times 5.50 + 91.0 \times 8.1 \\\\ 1237.6 kg m/s^2

Momentum before the collision = 1237.6 kg m/s².

b)

The velocity of the two hockey players after the collision from the law of conservation of the momentum as:

Momentum before collision = Momentum after the collision

1237.6 kg m/s² = (m₁+m₂)V

1237.6 kg m/s² =(2 ×91.0-kg )V

V=6.8 m/sec.

Hence, momentum before the collision velocity after the collision will be 1237.6 kg m/s² and 6.8 m/sec.

To learn more about the law of conservation of momentum refer;

brainly.com/question/1113396

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Splitting<span> atoms. 'Fission' is another word for </span>splitting<span>. The process of </span>splitting<span> a nucleus is called nuclear fission. ... For fission to happen, the </span>uranium-235<span> or plutonium-239 nucleus must first absorb a neutron.</span>
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That is false

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tekilochka [14]

Answer:

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This is also the same states found in Saturn too.

The pressure inside the largest planet in our solar system is very great.

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