India's monsoon area i beleive
Answer: 10kg
Explanation:
Given that:
Kinetic energy of puppy = 245J
Velocity of puppy = 7 m/s
mass of puppy = ?
Recall that kinetic energy is the energy possessed by a moving body. It is measured in joules, and depends on the mass and velocity of the moving body
i.e K.E = 1/2 x mass x (velocity)^2
245J = 1/2 x mass x (7 m/s)^2
245 = 0.5 x mass x 49
245 = 24.5 x mass
Mass = 245/24.5
Mass = 10kg
Thus, the mass of the puppy is 10kg
Answer:the wave lengths are shorter and faster
Explanation:
Plato
Answer:
![Imp = 7.5\,\frac{kg\cdot m}{s}](https://tex.z-dn.net/?f=Imp%20%3D%207.5%5C%2C%5Cfrac%7Bkg%5Ccdot%20m%7D%7Bs%7D)
Explanation:
Let assume that direction is positive when football travels to the player. The situation can be described properly by applying the definition of Momentum and Impulse Theorem. That is to say:
![(0.5\,kg)\cdot (15\,\frac{m}{s}) - F \cdot (0.02\,s) = 0\,kg\cdot \frac{m}{s}](https://tex.z-dn.net/?f=%280.5%5C%2Ckg%29%5Ccdot%20%2815%5C%2C%5Cfrac%7Bm%7D%7Bs%7D%29%20-%20F%20%5Ccdot%20%280.02%5C%2Cs%29%20%3D%200%5C%2Ckg%5Ccdot%20%5Cfrac%7Bm%7D%7Bs%7D)
The average force needed to stop is obtained after some algebraic manipulations:
![F = 375\,N](https://tex.z-dn.net/?f=F%20%3D%20375%5C%2CN)
The impulse delivered to the ball is:
![Imp = (375\,N)\cdot (0.02\,s)](https://tex.z-dn.net/?f=Imp%20%3D%20%28375%5C%2CN%29%5Ccdot%20%280.02%5C%2Cs%29)
![Imp = 7.5\,\frac{kg\cdot m}{s}](https://tex.z-dn.net/?f=Imp%20%3D%207.5%5C%2C%5Cfrac%7Bkg%5Ccdot%20m%7D%7Bs%7D)