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quester [9]
3 years ago
11

you ride a bike for 2 hours at 25 km/hr then 3 hours at 34 km/hr. what is your average velocity (in km/hr)?

Physics
1 answer:
mamaluj [8]3 years ago
4 0
<h3>Answer:</h3>

30.4 km/hr

<h3>Explanation:</h3>

<u>We are given</u>;

  • Speed in the first 2 hours as 25 km/hr
  • Speed in the next 3 hours as 34 km/hr

We are required to determine the average velocity in km/hr

  • To get the average velocity we divide total distance by total time.
  • Thus, we need to determine the total distance

Distance = Speed × time

Distance covered in the first 2 hours;

               = 25 km/hr × 2 hours

               = 50 km

Distance in the next 3 hours

                = 34 km/hr × 3 hours

                = 102 km

Therefore, total distance = 50 km + 102 km

                                        = 152 km

Total time = 2 hrs + 3 hrs

                = 5 hours

Therefore;

Average speed = 152 km ÷ 5 hours

                          = 30.4 km/hr

Thus, the average speed is 30.4 km/hr

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posledela

Answer:

<h3>JAWAB SECEPATNYA pliss</h3><h3 /><h3>Anda memiliki rangkaian paralel 10 volt, dengan 2 resistor di atasnya. Berapakah tegangan pada</h3><h3>resistor pertama? Di seberang kedua?</h3><h3 /><h3>(saya akan menandai tercerdas tolong bantu)</h3>

Explanation:

Hukum Ohm

= tegangan

= kuat arus

= ketahanan

Kalau kamu mau mencari tegangan listrik, kamu gunakan rumus V = I.R. Kalau ternyata kamu perlu mencari kuat arus listrik, maka gunakan rumus I = V/R. Nah, kalau yang kamu cari adalah hambatan listrik, maka gunakan rumus R = V/I.

4 0
2 years ago
A train travels 200km/hr. how much distance will the train be from the station in 2.5 hours?
SCORPION-xisa [38]

Answer:

500km

Explanation:

Given parameters:

Speed  = 200km/hr

Time taken  = 2.5hrs

Unknown:

Distance  = ?

Solution:

To solve this problem, we use the speed, time and distance equation.

   Therefore;

  Distance  = Speed x time

So;

  Distance  = 200 x 2.5  = 500km

6 0
2 years ago
What is the unit for atomic mass
Sholpan [36]
An atomic mass unit (symbolized AMU or amu) is defined as precisely 1/12 the mass of an atom of carbon-12. The carbon-12 (C-12) atom has six protons and six neutrons in its nucleus.
3 0
3 years ago
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5. Why might it be useful to determine the elements that a planet or moon is made up of?
exis [7]

because we will know more about out solar system

3 0
3 years ago
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To find some of the parameters characterizing an object moving in a circular orbit.The motivation for Isaac Newton to discover h
tamaranim1 [39]

Answer:

K = \frac{GMm}{2r}

T^2 = 4\pi^2(\frac{r^3}{GM})

Explanation:

As we know that for a satellite the force of gravitation is equal to the centripetal force

so we will have

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

\frac{mv^2}{r} = \frac{GMm}{r^2}

so we know that kinetic energy is given as

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so we have

K = \frac{GMm}{2r}

now for time period we know

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from above expression of kinetic energy we have

v = \sqrt{\frac{GM}{r}}

so we have

T = \frac{2\pi r}{\sqrt{\frac{GM}{r}}}

so square of time period is given as

T^2 = 4\pi^2(\frac{r^3}{GM})

3 0
3 years ago
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