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:
True
Explanation:
The reason is because factories or other places like a lab have to test if its safe and a good product to sell
Haha... no,
ferromagnetism is a substance with a high/natural susceptibility to magnetization. So those are your earth metals exhibiting unique magnetic behavior like iron, cobalt, and nickel.
Paramagnetism is when certain materials are weakly attracted by an external magnetic field, producing their own induced magnetic fields, aluminum is an example
Diamagnetism is when to magnetic things approach each other and there are repelling due to their electrons orbiting in opposite directions.
It would be 30 percent I think. Hope thats what you are looking for.
Answer:
F = −10093.41 N
Explanation:
Given that,
Mass of a baseball, m = 143 g = 0.143 kg
Initial speed of the baseball, u = +38.8 m/s
The hitter's bat is in contact with the ball for 1.20 ms and then travels straight back to the pitcher's mound at a speed of 45.9 m/s, v = -45.9 m/s
We need to find the average force exerted on the ball by the bat. So, Force is given by :
a is acceleration
So, the average force exerted on the ball by the bat has a magnitude of 10093.41 N.