yes, because you have to observe your experiment while doing it in case something goes wrong
Answer:
-100 kg · m/s
Explanation:
We can find the momentum of an object using the formula:
- p = mv
- where p = momentum (kg * m/s), m = mass (kg), v = velocity (m/s), and p and v are vectors
Let's start by converting the mass of the object to kilograms.
Since the left direction is the negative direction, we know that the velocity of the object is -25 m/s.
Using these variables, we can solve for p in the formula.
- p = mv
- p = (4 kg)(-25 m/s)
- p = -100 kg · m/s
The momentum of the object is -100 kg · m/s.
Answer:
The speed of her at the bottom is 24.035 m/s.
Explanation:
Given that,
Speed of cyclist = 12 m/s
Height = 30 m
Distance d = 450 m
Mass of cyclist and bicycle =70 kg
Drag force = 12 N
We need to calculate the speed at the bottom
Using conservation of energy
K.E+P.E=drag force+K.E+P.E
Potential energy is zero at the bottom.
K.E+P.E=drag force+K.E
![\dfrac{1}{2}mv^2+mgh=Fx+\dfrac{1}{2}mv^{2}](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7B2%7Dmv%5E2%2Bmgh%3DFx%2B%5Cdfrac%7B1%7D%7B2%7Dmv%5E%7B2%7D)
![\dfrac{1}{2}\times70\times12^2+70\times9.8\times30=12\times450+\dfrac{1}{2}\times70\timesv^2](https://tex.z-dn.net/?f=%5Cdfrac%7B1%7D%7B2%7D%5Ctimes70%5Ctimes12%5E2%2B70%5Ctimes9.8%5Ctimes30%3D12%5Ctimes450%2B%5Cdfrac%7B1%7D%7B2%7D%5Ctimes70%5Ctimesv%5E2)
![25620=5400+35v^2](https://tex.z-dn.net/?f=25620%3D5400%2B35v%5E2)
![35v^2=25620-5400](https://tex.z-dn.net/?f=35v%5E2%3D25620-5400)
![35v^2=20220](https://tex.z-dn.net/?f=35v%5E2%3D20220)
![v^2=\dfrac{20220}{35}](https://tex.z-dn.net/?f=v%5E2%3D%5Cdfrac%7B20220%7D%7B35%7D)
![v=\sqrt{\dfrac{20220}{35}}](https://tex.z-dn.net/?f=v%3D%5Csqrt%7B%5Cdfrac%7B20220%7D%7B35%7D%7D)
![v=24.035\ m/s](https://tex.z-dn.net/?f=v%3D24.035%5C%20m%2Fs)
Hence, The speed of her at the bottom is 24.035 m/s.
Answer:
pressure on a given day
Explanation:
because you can't find pressure in a day