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3 years ago

10

To travel at a constant speed,a car engine provides 24 KW of useful powers. The driving force on the car is 600N.AT what speed d

oes it travel? A 2.5 B 4.0 C.25 D 40

1 answer:

Whitepunk [10]3 years ago

3 0

Answer: D. 40

Explanation:

Power = Force * Velocity

Force = 600N

Power needs to be converted to Watts:

= 24 * 1,000

= 24,000 W

24,000 = 600 * Velocity

Velocity = 24,000/600

= 40 m/s

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Read 2 more answers

You will need to use the Momentum Principle to do the first part of this problem, and the Energy Principle to do the second part

My name is Ann [436]

Answer

given,

Mass of satellite, m = 4500 kg

Mass of the earth, M = 6 x 10²⁴ Kg

Earth circular orbit radius, R = 9.3 x 10⁶ m

a) To find the speed of the satellite

we need to equate the gravitation force between earth and satellite with the centripetal force.

$\dfrac{GMm}{R^2}=\dfrac{mV^2}{R}$

$V = \sqrt{\dfrac{GM}{R}}$

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b) Minimum amount of energy of satellite

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E = 9.68 x 10¹⁰ J

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4 years ago