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Juliette [100K]
3 years ago
15

Most stars are a.brown fs b.main sequence c.white dwarfs d.pulsars

Physics
1 answer:
trapecia [35]3 years ago
3 0
I believe the answer is B. Main sequence 
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A flatbed truck is carrying a 20.0 kg crate along a level road. the coefficient of static friction between the crate and the bed
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<span>3.92 m/s^2 Assuming that the local gravitational acceleration is 9.8 m/s^2, then the maximum acceleration that the truck can have is the coefficient of static friction multiplied by the local gravitational acceleration, so 0.4 * 9.8 m/s^2 = 3.92 m/s^2 If you want the more complicated answer, the normal force that the crate exerts is it's mass times the local gravitational acceleration, so 20.0 kg * 9.8 m/s^2 = 196 kg*m/s^2 = 196 N Multiply by the coefficient of static friction, giving 196 N * 0.4 = 78.4 N So we need to apply 78.4 N of force to start the crate moving. Let's divide by the crate's mass 78.4 N / 20.0 kg = 78.4 kg*m/s^2 / 20.0 kg = 3.92 m/s^2 And you get the same result.</span>
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What is the potential energy for 65kg climber on top of Mount Everest (8,800 m high)
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