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2 years ago

Which of the following statements describes the law of inertia?

Physics

1 answer:

Drupady [299]2 years ago

8 0

Answer:

B. objects remain in the same state of motion unless a force acts on them

Explanation:

Sana nakatulong

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Newtown third law applies to blank of objects

fomenos

Answer:

All

Explanation:

I'm not sure what you meant but Newton's third law which basically states that every action has an equal and opposite reaction applies to all objects. So I think the answer is all.

8 0

3 years ago

A train is moving in a straight railway where it covered one third of the distance with

Alexxandr [17]

Answer:

The average speed of the train is 45 km/h

Explanation:

Speed

It's defined as the distance (d) per unit of time (t) traveled by an object. The formula is:

$\displaystyle v=\frac{d}{t}$

Let's call x the total distance covered by the train. It covered d1=1/3x with a speed of v1=25 km/h. The time taken is calculated solving for t:

$\displaystyle t_1=\frac{d_1}{v_1}$

$\displaystyle t_1=\frac{1/3x}{25}$

$\displaystyle t_1=\frac{x}{75}$

Now the rest of the distance:

d2 = x - 1/3x = 2/3x

Was covered at v2=75 km/h. Thus the time taken is:

$\displaystyle t_2=\frac{d_2}{v_2}$

$\displaystyle t_2=\frac{2/3x}{75}$

$\displaystyle t_2=\frac{2x}{225}$

The total time is:

$\displaystyle t_t=\frac{x}{75}+\frac{2x}{225}$

$\displaystyle t_t=\frac{3x}{225}+\frac{2x}{225}$

$\displaystyle t_t=\frac{5x}{225}$

Simplifying:

$\displaystyle t_t=\frac{x}{45}$

The average speed is the total distance divided by the total time:

$\displaystyle \bar v=\frac{x}{\frac{x}{45}}$

Simplifying:

$\boxed{\displaystyle \bar v=45\ km/h}$

The average speed of the train is 45 km/h

5 0

3 years ago

A sprinter generates a constant force of 52 N as he runs 100 m. How much work did he do?

LUCKY_DIMON [66]

You just multiply these two numbers. It's 5200J, or 5.2kJ

3 0

3 years ago

A. If you set a cannonball to 1500 m/s, what happens? Explain why you think it moves this way.

creativ13 [48]

Answer:

I beleive it would shoot very far up into the sky

Explanation:

7 0

3 years ago

Read 2 more answers

Your study buddy claims that an electron always experiences a force in an electric field, but not always in a magnetic field. do

timurjin [86]

It's true charged particles are always acted on by an electric field.when the velocity of the electron is parallel to the magnetic field, the magnetic force vanishes.

4 0

2 years ago