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ASHA 777 [7]
3 years ago
15

A boat has a porthole window, of

Physics
1 answer:
jekas [21]3 years ago
7 0

Answer:

F = 534.6[N]

Explanation:

We must find the pressure exerted by the water at the depth of the boat, by means of the following equation.

P=Ro*g*h

where:

Ro = density of sea water = 1027 [kg/m³]

g = gravity acceleration = 9.81 [m/s²]

h = wáter Depth =  6.25 [m]

Now replacing:

P=1027*9.81*6.25\\P=62967.93[Pa]

The net force is:

F = P*A\\F = 62967.93*0.00849\\F = 534.6[N]

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A car with a mass of 1.1 × 103 kilograms hits a stationary truck with a mass of 2.3 × 103 kilograms from the rear end. The initi
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Answer:

The velocity of the truck after this elastic collision is 15.7 m/s            

Explanation:

It is given that,

Mass of the car, m_1=1.1\times 10^3\ kg

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m_1u_1+m_2u_2=m_1v_1+m_2v_2

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