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3 years ago

Can anybody help me with this?? (Picture included.)

Physics

1 answer:

Alborosie3 years ago

3 0

A,B, C,C, A, B, C, A , D B

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What is the acceleration of the car at segment C?

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-30 m/s2

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A technician is troubleshooting a problem. The technician tests the theory and determines the theory is confirmed. Which of the

vladimir1956 [14]

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b) Document lessons learned.

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First he should do documentation

then C

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When you and a friend move a couch to another room, you exert a force of 75 N over 5 m. How much work did you do?

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Answer:375J

Explanation:

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A) A small source emits sound waves with a power output of 180 W.

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3 years ago

Calculate the mass of an object that is accelerating 14 m/s^2 with a force of 280 N

Masteriza [31]

Answer:

$\boxed {\boxed {\sf 20 \ kilograms }}$

Explanation:

Force is the product of mass and acceleration.

$F=m*a$

We can find mass, since we know the acceleration and force.

The acceleration is 14 meters per square second. The force is 280 Newtons, but we should convert the units to make the problem simpler later on.

1 kilogram meter per square second is equal to 1 Newton.
280 Newtons are equal to 280 kg*m/s²

$F= 280 \ kg*m/s^2 \\a= 14 \ m/s^2$

Substitute the values into the formula.

$280 \ kg*m/s^2 = m* 14 \ m/s^2$

We want to solve for the mass or m. Therefore we must isolate the variable on one side of the equation.

m is being multiplied by 14 m/s². The inverse of multiplication is division. Divide both sides of the equation by 14 m/s²

$\frac{280 \ kg*m/s^2}{14 \ m/s^2}=\frac{m*14 \ m/s^2}{14 \ m/s^2}$

$\frac{280 \ kg*m/s^2}{14 \ m/s^2}=m$

The m/s² will cancel, which is why we converted the units earlier.

$\frac{280 \ kg}{14 }=m$

$20 \ kg=m$

The mass of the object is <u>20 kilograms.</u>

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3 years ago