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ddd [48]
2 years ago
11

A person is standing on a raft; their

Physics
2 answers:
klemol [59]2 years ago
5 0

Answer:

the volume displaced by the raft = 0.233 m3

Explanation:

correct for Acellus

krok68 [10]2 years ago
3 0

Answer:

The volume of water displaced by the raft is 0.233 m³

Explanation:

The question relates to Archimedes' principle which states that the buoyant force experienced by an object immersed in a fluid is equal to the weight of (the force of gravity on) the displaced fluid

The given parameters are;

The combined mass of the person and the raft, m = 233 kg

The liquid on which the raft is located = Water

The density of water, \rho _{water} = 1000 kg/m³

Weight = Mass, m × g

Where;

m = The mass of the object

g = The acceleration due to gravity = 9.8 m/s²

Given that the raft is on the surface of the water (floating), the buoyant force is equal to the combined weight of the person and the raft = 233 kg

The combined weight of the person and the raft, W_{combined} = 233 kg × 9.8 m/s² = 2,283.4 N

Therefore;

The buoyant force = 2,283.4 N = The weight of the water displaced

The mass of the water displaced, m_{water}, = 2,283.4 N/(9.8 m/s²) = 233 kg

Density = Mass/Volume

The volume of water displaced by the raft = The mass of the water displaced/(The density of the water) = 233 kg/(1,000 kg/m³) = 0.233 m³.

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Answer:No

Explanation:

No

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Two cars collide at an icy intersection and stick together afterward. The first car has a mass of 1200 kg and was approaching at
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To resolve point A and B we need the concepts related to conservation of momentum (By collision) and Kinetic Energy. Conservation of momentum is given by the equation,

m_1\vec{v_1}+m_2\vec{v_2} = (m_1+m_2)\vec{v}

Our values in the statment are:

m_1 = 1200kg

v_1 = 6m/s

m_2 = 900kg

v_2 = 24m/s

Part A) As it is in an icy intersection, there is two different components (x,y) then,

1200(-6\hat{j})+900(-24\hat{i}) = (1200+900)\vec{v}

2100\vec{v} = -21600\hat{i}-7200\hat{j}

\vec{v} = -72/7\hat{i}-24/7\hat{j}

Then the magnitude is,

|\vec{v}| = 9.6525m/s

Part B) To obtain the Kinetic Energy Loss we need to use its equation, which is given by,

KE_i = \frac{1}{2}m_1v_1^2+\frac{1}{2}m_2v_2^2

KE_i = \frac{1}{2}(1200)(6)^2+\frac{1}{2}(900)(24)^2

KE_i = 280.8kJ

The final energy is given by,

KE_f = \frac{1}{2}(m_1+m_2)v_f^2

KE_f = \frac{1}{2} (1200+900)(9.65)

KE_f =97778.625J

Then the change in Kinetic Energy is

\Delta KE = KE_f-KE_i = 97.778kJ- 280.8kJ

\Delta KE = -183.02kJ

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Falling objects drop with an average acceleration of 9.8 m/s2. An arrow is shot with a velocity of 11.76 m/s straight down from
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Answer:

3.8 secs

Explanation:

Parameters given:

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Using one of Newton's equations of linear motion, we have that:

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The sign is positive because the arrow is moving downward, in the same direction as gravitational force.

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