Can you measure tenths if a gram with confidence using balance?

1 answer:

7 0

It depends on the calibration and sensitivity of the balance. If you’re using a lab balance, then yes. Most lab balances are calibrated to the hundredths at a minimum. Take time to tare the scale correctly, and give the sample enough time on the scale to reach a definite number.

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The car has a mass of 1200kg. The car has a forward force of 3400N but friction has a force of 400N going against it. What is th

jonny [76]

The acceleration of the car : 2.5 m/s²

<h3>Further explanation</h3>

Newton's 2nd law explains that the acceleration produced by the resultant force on an object is proportional and in line with the resultant force and inversely proportional to the mass of the object

∑F = m. a

<h3 />

Mass of the car = 1200 kg

Forward force = 3400 N

Friction force = 400 N

The direction of motion of the friction force will be opposite to the forward force, so that both of them can be subtracted to get the value of the net force (net force: combination / sum of all forces acting on an object)

$\tt \sum F=3400-400=3000~N$

So the acceleration :

$\tt a=\dfrac{\sum F}{m}\\\\a=\dfrac{3000}{1200}\\\\a=2.5~m/s^2$

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If you are playing tug of war with your friend and you move your friend 3 meters using a force of 5 N, How much work did you do?

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Answer: Work was 15 Joules

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W = 5 N · 3 m

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What is force? Why?

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In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity to accelerate. Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity.

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