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3 years ago

Question 2 - If Juan starts out at 10m/s, and in 15 s speeds up to 60 m/s, what is his acceleration?

Physics

1 answer:

34kurt3 years ago

5 0

Answer:

B) 3.33 m/s²

Explanation:

Given that,

The initial velocity of Juan, u = 10 m/s

Final velocity of Juan, v = 60 m/s

Time taken, t = 15 s

The acceleration is given by the relation

a = v-u/t m/s²

Substituting in the above equation

a = 60 - 10 / 15

a = 3.33 m/s²

Hence, the acceleration of the Juan is, a = 3.33 m/s²

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Answer:

31.321 rad/s

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Pressure is given by

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3 years ago

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mylen [45]

Find how much work ∆W is done by the motor in lifting the elevator:

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where

• P = 45.0 kW = power provided by the motor

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Solve for ∆W :

∆W = P ∆t = (45.0 kW) (20.0 s) = 900 kJ

In other words, it requires 900 kJ of energy to lift the elevator and its passengers. The combined mass of the system is M = (m + 490.0) kg, where m is the mass of the elevator alone. Then

∆W = M g h

where

• g = 9.80 m/s² = acceleration due to gravity

• h = 35.0 m = distance covered by the elevator

Solve for M, then for m :

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A 20-N force acts on an object with a mass of 2.0kg. what is the objects acceleration?

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Answer:

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aleksandr82 [10.1K]

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