2 years ago

2. A car has a mass of 1700 kg and is moving at a speed of 25 m/s. Find its momentum.

Physics

1 answer:

Whitepunk [10]2 years ago

5 0

Answer:

42500 kg.m/s

Explanation:

Momentum = mass * velocity

Momentum = 1700* 25

Momentum = 42500 kg.m/s

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When three identical bulbs of 60W,200V rating are connected in series at a 200V supply the power drawn by them will be?

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Answer:

P = 180 [w]

Explanation:

To solve this problem we must use ohm's law, which is defined by the following formula.

V = I*R & P = V*I

where:

V = voltage = 200[volts]

I = current [amp]

R = resistance [ohm]

P = power [watts]

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I = 180/200

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And the power is defined by P = V*I

we know that the voltage is equal to 200[V], therefore

P = 200*0.9

P = 180 [w]