3 years ago

Which of the following examples illustrates Newton’s second law of motion?

Physics

2 answers:

3241004551 [841]3 years ago

7 0

It would be the second one

Anuta_ua [19.1K]3 years ago

6 0

Answer: much less force is required to push an empty shopping cart than a shopping cart

Explanation:

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In this experiment, the

tigry1 [53]

Result of the other variable

6 0

3 years ago

If a machine has an efficiency of 94% and you apply 574J of work, how much work do you get out of the machine

Mariana [72]

<h3>Answer:</h3>

539.56 Joules

<h3>Explanation:</h3>

Efficiency of a machine is the ratio of work output to work input expressed as a percentage.

Efficiency = (work output/work input) × 100%
Efficiency of a machine is not 100% because so energy is lost due to friction of the moving parts and also as heat.

In this case;

Efficiency = 94%

Work input = 574 Joules

Therefore, Assuming work output is x

94% = (x/574 J) × 100%

0.94 = (x/574 J)

Thus, you get work of 539.56 J from the machine

7 0

3 years ago

What is the force of a 12 kg rock falling at 9.8m/s/s

velikii [3]

F=W=mg
F=12*9.8

F=117.6Newtons

5 0

3 years ago

What is the density of iron if 5.0 cm3 has a mass of 39.5g

weqwewe [10]

Answer : $\rho = 7.9\ g/cm^3$

Explanation :

It is given that

Mass of iron, m = 39.5 g

Volume of iron, $V = 5\ cm^3$

So, density is :

density, $\rho =\dfrac{mass}{volume}$

$\rho =\dfrac{39.5g}{5cm^3}$

$\rho = 7.9\ g/cm^3$

7 0

3 years ago

Which experiment best shows water’s ability to act as a solvent? raise the temperature of water and record its boiling point. fr

IrinaVladis [17]

The vanishing of an ionic solid (like table salt) would be an example of acting like a solvent

8 0

3 years ago

Read 2 more answers