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4 years ago

A piano with a mass of 130 kg is lifted 10m above the ground in 5 s by a crane.

Physics

2 answers:

hammer [34]4 years ago

7 0

The 2548 watts should be the power that is used by the crane according to the formula

Sergio [31]4 years ago

6 0

<em> $power = 2548 \: watt \\ solution \\ mass = 130 \: kg \\ distance = 10m \\ time = 5 \: sec \\ power = \frac{w}{t} \\ \: \: \: \: \: \: \: \: \: \: = \frac{f \times d}{t} \\ \: \: \: \: \: \: \: \: = \: \frac{m \times g \times d}{t} \\ \: \: \: \: \: \: \: \: \: = \frac{130 \times 9.8 \times 10}{5} \\ \: \: \: \: \: \: \: \: = \frac{12740}{5} \\ \: \: \: \: \: = 2548 \: watt \\ hope \: it \: helps$ </em>

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3 years ago

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Explanation:

It s given that,

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3 years ago

A 1200-kg car initially at rest undergoes constant acceleration for 8.8 s, reaching a speed of 10 m/ s. It then collides with a

atroni [7]

Answer:

The final kinetic energy of the two-car system is 60,000 J.

Explanation:

Given;

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time of motion, t = 8.8 s

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Apply the principle of conservation of kinetic energy; the initial kinetic energy is equal final kinetic energy.

$K.E_i = K.E_f\\\\K.E_f = \frac{1}{2}mv^2\\\\K.E_f = \frac{1}{2}(1200)(10)^2\\\\K.E_f = 60,000 \ J$

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3 years ago

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3 years ago

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Irina-Kira [14]

Answer:

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3 years ago