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3 years ago

8

10 inches is equivalent to

1 answer:

Misha Larkins [42]3 years ago

5 0

Answer:

25.4 centimeters?

Explanation:

I’m guessing you needed the conversion? Let me know.

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A constant friction force of 25 N acts on a 65-kg skier for 15 s on level snow. What is the skier’s change in velocity

nikdorinn [45]

Answer:

$\Delta v=5.77m/s$

Explanation:

Newton's 2nd Law relates the net force <em>F</em> on an object of mass <em>m </em>with the acceleration <em>a</em> it experiments by <em>F=ma.</em> In our case the net force is the friction force, since it's the only one the skier is experimenting horizontally and the vertical ones cancel out since he's not moving in that direction. Our acceleration then will be:

$a=\frac{F}{m}$

Also, acceleration is defined by the change of velocity $\Delta v$ in a given time t, so we have:

$a=\frac{\Delta v}{t}$

Since we want the change in velocity, <em>mixing both equations</em> we conclude that:

$\Delta v=at=\frac{Ft}{m}$

Which for our values means:

$\Delta v=\frac{Ft}{m}=\frac{(25N)(15s)}{(65Kg)}=5.77m/s$

4 0

4 years ago

Physical properties of a base include...

neonofarm [45]

The correct answer is A

8 0

3 years ago

A car is moving 14.4 m/s. It decelerates at -1.55 m/s^2 for 4.26 s. It then accelerates at 1.83 m/s^2 until it reaches 11.8 m/s.

Aleonysh [2.5K]

The total time is 6.45 s

Explanation:

The motion of the car is a uniformly accelerated motion, so we can use suvat equations.

In the first part,

$u_1 = 14.4 m/s$ (initial velocity)

$a_1 = -1.55 m/s^2$ (acceleration)

$t_1=4.26 s$ (time of the first part)

So, we can find the velocity of the car after the first part, by using

$v_1 = u_1 +a_1 t_1 =14.4+(-1.55)(4.26)=7.8 m/s$

This is therefore the initial velocity of the second part:

$u_2 = v_1 = 7.8 m/s$

$a_2 = 1.83 m/s^2$ (acceleration in the second part)

$v_2 = 11.8 m/s$ (final velocity)

And therefore,

$v_2 = u_2 + a_2 t_2\\t_2=\frac{v_2-u_2}{a_2}=\frac{11.8-7.8}{1.83}=2.19 s$

So, the total time is

$t=t_1+t_2=4.26+2.19=6.45 s$

Learn more about uniformly accelerated motion:

brainly.com/question/9527152

brainly.com/question/11181826

brainly.com/question/2506873

brainly.com/question/2562700

#LearnwithBrainly

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3 years ago

An observer notices that the sun is directly overhead at midday during the summer solstice. what is this observer's latitude upo

marissa [1.9K]

Answer:

At 23.5 deg north of the equator this person would see the sun directly overhead at the summer solstice at noon

8 0

2 years ago

1)How does scientist use radioactive dating to determine how old a fossil is?

Lyrx [107]

Answer:

the answer is B

Explanation:

i got mine right when i did mine

8 0

3 years ago