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telo118 [61]
3 years ago
7

A 20-kg child is on top of a slide was pushed down by his brother giving him an initial speed of 2 m/s down the slide. what is t

he child's speed at the bottom of the slide if the slide is 5 m high and 10m long and the force of friction between the child and slide is negligible?​
Physics
1 answer:
Andrews [41]3 years ago
4 0

Answer:

please find your answer in the attached picture, along with explanation.

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An undiscovered planet, many lightyears from Earth, has one moon in a periodic orbit. This moon takes 2010 × 103 seconds (about
vazorg [7]

Answer:

Radial acceleration of moon is a_{r} = 2.246\times 10^{-3}\frac{m}{s^{2} }

Explanation:

Given :

Time period T = 1.987 \times 10^{6} sec

Distance from center of moon to planet r = 225 \times 10^{6} m

From the equation of radial acceleration,

  a_{r} = r\omega ^{2}

Where \omega = 2\pi f = \frac{2\pi }{T}

So   \omega = 3.16 \times 10^{-6} \frac{rad}{s}

Now moon's radial acceleration,

 a_{r} = 225 \times 10^{6} \times (3.16 \times 10^{-6} )^{2}

 a_{r} = 2246.76 \times 10^{-6}

 a_{r} = 2.246\times 10^{-3} \frac{m}{s^{2} }

7 0
3 years ago
If you were to drop a rock from a tall building, assuming that it had not yet hit the ground, and neglecting air resistance, aft
8_murik_8 [283]

Answer:

Explanation:

Using the equation of motion v = u + at to get the speed at which the object would be travelling.

v is the final speed (in m/s)

u is the initial velocity (in m/s)

a is the acceleration (in m/s²)

t is the time taken (in  secs)

Given parameters

u = 0m/s

t = 10s

a = g = 9.8m/s²

Substituting this values into the formula;

v = 0+9.8(10)

v = 0+ 98

v  = 98m/s

<em>Hence the rock will be travelling at a speed of 98m/s.</em>

6 0
3 years ago
The path that thermal energy follows is from ___________ to ___________
Helga [31]
Warmer to colder objects
5 0
3 years ago
If your weight is 588N on the earth, how far should you go from the centre of the earth so that your weight will be 300N? The ra
Rom4ik [11]

Answer:

Hmm, Well I am pretty sure the answer is 288N

Explanation:

I got the answer 288N but I am not sure if that is correct. Hope it helps! :D

5 0
3 years ago
If your mass is 63.7 kg, and you are standing 7.5 m away from a boulder with
murzikaleks [220]

Answer:

B

Explanation:

F=\frac{Gm1m2}{r^2}

F=(6.67 x 10^-11)\frac{63.7X9,750.6}{7.5^2}

F=7.36502254e-7

4 0
2 years ago
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