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Pavel [41]
3 years ago
13

Select answer about motion and newtons law and explain why it's correct 23POINTS NEED ASAP

Physics
1 answer:
zlopas [31]3 years ago
3 0

The train would need the greatest amount of force due to weight! If you think of it, a baseball won't need much force to stop it, but if you have a heavy train, it will need excessive force to stop the train. The answer would be #3


I hope this answer helps!

Sorry if it doesn't make sense, as I don't know that much about physics! I am just thinking of what makes sense.

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After being accelerated through a potential difference of 5.33 kv, a singly charged carbon ion (12c) moves in a circle of radius
LekaFEV [45]
I'm stuck on the same question, as well :(
4 0
3 years ago
(answer fast and correctly and i will give you brainiest and 5 star's. )
oee [108]

Answer:

Energy cannot be created or destroyed.

Explanation:

its in the name, law of "conservation" of energy. energy can only change forms not be destroyed

7 0
3 years ago
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A 0.245 kg ball is thrown straight up from 2.07 m above the ground. Its initial vertical speed is 8.00 m/s. A short time later,
iris [78.8K]

Answer:

The work done by gravity is 4.975 \: Joules

Explanation:

The data given in the question is :

Mass is 0.245 kg

Height from ground is 2.07 m

As we know , the work done is state function , it depends on initial and final position not on the path followed.

So, work done by gravity = change in potential energy

Work done = Initial potential energy - final potential energy

Insert values from question

Work done = mass \times gravity \times (change \: in \: height)

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So, work done = 4.975 Joules

Hence the work done by gravity is 4.975 \: Joules

3 0
3 years ago
Which car is harder to stop and why?
kondor19780726 [428]

Answer:

The momentum of bath cars is 40000 Ns which make the difficulty to stop each car in aspect of fprce is the same.

Explanation:

Momentum (P) =mass(m) × velocity (v)

For car A,

                    P = m × v = 1000 × 40 = 40000 Ns

For car B,

                    P = m × v = 4000 × 10 = 40000 Ns

Force (F) = Momentum change(ΔΡ)/ time taken(t)

            F = ΔΡ/t

When stopping the car the momentum changes from 40000 Ns to 0

So momentum change in both cars is the same. So to stop the two cars in a  given time (t) you need the same force, which means you will feel same difficulty.

             

8 0
3 years ago
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Elis [28]
The air flows slower in a bigger space. The air in a small space hit each other heating up, and move faster and faster. is that what your asking?
4 0
3 years ago
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