Pretty simple
The no atmosphere says that theres no air resistance, making the problem 10 times easier.
If the hammer is thrown upwards, it has a positive inital velocity of 14m/s
Now gravity is trying to pull it downwards so the accelerating is -3.5m/s^2 (closest planet I can think off with this acceleration is Mercury, but thats besides the point)
Anyways we can use kinematic equations to solve that
Vf = vi + at
Vf = 14m/s +(-3.5)(8)
Vf = -14 m/s
So after 8 seconds the ball is going downwards at the same height that you threw it.
answer : -14m/s or you can say 14m/s downwards
Answer:
So Tammy must move with speed 4.76 m/s in opposite direction of Jackson
Explanation:
As per law of conservation of momentum we know that there is no external force on it
So here we can say that initial momentum of the system must be equal to the final momentum of the system
now we have
![m_1v_1 + m_2v_2 = 0](https://tex.z-dn.net/?f=m_1v_1%20%2B%20m_2v_2%20%3D%200)
final they both comes to rest so here we can say that final momentum must be zero
now we have
![34 v + 54 (3 m/s) = 0](https://tex.z-dn.net/?f=34%20v%20%2B%2054%20%283%20m%2Fs%29%20%3D%200)
![v = -4.76 m/s](https://tex.z-dn.net/?f=v%20%3D%20-4.76%20m%2Fs)
Refraction is the change in direction of a wave, caused by the change in the wave's speed. Examples of waves include sound waves and light waves. Refraction is seen most often when a wave passes from one transparent medium to another transparent medium. Different types of medium include air and water. When a wave passes from one transparent medium to another transparent medium, the wave will change its speed and its direction. For example, when a light wave travels through air and then passes into water, the wave will slow and change direction.
The answer is refraction. When a wave from one medium enters another medium, its direction changes due to the change of speed (phase velocity changes but frequency remains the same). The wave slows down when it enters a denser medium from the one it came from hence its path seems to bend.
What’s the question though