Answer:
Fcoso-f =ma. F= ma 15 = 4.5 a then get acceleration. Fcoso- umg = ma then get friction
Answer:
Because the speed of sound travels at +- 1300 km/h and the car that is approaching isn't that fast. So u first hear the sound before the car reaches u.
i hope it helps
Explanation:
Answer:
<h3>The answer is 2.0 g/mL</h3>
Explanation:
The density of a substance can be found by using the formula
![density = \frac{mass}{volume} \\](https://tex.z-dn.net/?f=density%20%3D%20%20%5Cfrac%7Bmass%7D%7Bvolume%7D%20%5C%5C)
From the question
mass = 100 g
volume = 50 mL
We have
![density = \frac{100}{50} = \frac{10}{5} \\](https://tex.z-dn.net/?f=%20density%20%3D%20%20%5Cfrac%7B100%7D%7B50%7D%20%20%3D%20%20%5Cfrac%7B10%7D%7B5%7D%20%20%5C%5C%20)
We have the final answer as
<h3>2.0 g/mL</h3>
Hope this helps you
Answer:
The force on the charge at the origin is 0 N .
Explanation:
All charges are positive. So, in x axis force exerted by the charge located in the position (10 cm, 0 cm) will be canceled with the force exerted by the charge located in the position (-10 cm, 0 cm). In the same way, in y axis the force exerted by the charge located in the position (0 cm, 10 cm) will be canceled with the force exerted by the charge located in the position (0 cm, -10 cm).
Translation
A 100kg roller coaster reaches the first hill at 2m / s. the height of the first hill is 20 meters. *Find the total energy* Question added
Answer:
19820 J
Explanation:
Total energy is the sum of kinetic and potential energy
Potential energy is given by mgh
Kinetic energy is given by ![0.5mv^{2}](https://tex.z-dn.net/?f=0.5mv%5E%7B2%7D)
The combination will then be
and substituting m for 100 Kg and 2 m/s for v then taking g as 9.81 while h is given as 20 m we obtain energy as ![100(9.81\times 20 +0.5\times 2^{2})=19820 J](https://tex.z-dn.net/?f=100%289.81%5Ctimes%2020%20%2B0.5%5Ctimes%202%5E%7B2%7D%29%3D19820%20J)