Answer:
This is because , Repulsion takes place only between two likes poles of a magnet whereas attraction takes place between two unlike poles of a magnet and also between a magnet and a magnetic material . So , repulsion is the sure test of magnetism .
Explanation:
OOP :P
Answer:
The speed of a turtle is 4m/s
Explanation:
speed = distance/time
distance = 100m
time = 25s
s = 100/25
= 4m/s
We Know, F = Gm₁m₂ / r²
When, distance is doubled, it would be:
F' = Gm₁m₂ / (2r)²
F' = Gm₁m₂ / 4r
So, we can see, Force has decreased by 4 times.
Hope this helps!
Answer:
c. 0.71 [s]
Explanation:
To solve this problem we must use the following equation of kinematics.
where:
Vf = final velocity = 0 (because when the ball reaches the top, there is no movement)
Vo = initial velocity = 7 [m/s]
g = gravity acceleration = 9.81 [m/s²]
t = time [s]
Note: The negative sign of the equation means that the movement is againts the direction of the gravity acceleration.
![0 = 7 - (9.81*t)\\t = 0.713 [s]](https://tex.z-dn.net/?f=0%20%3D%207%20-%20%289.81%2At%29%5C%5Ct%20%3D%200.713%20%5Bs%5D)
Answer:
1) 50 facing towards the right
2) 150 facing right
3) 200 facing right
4) 0- no direction
5) 50- facing left
6) 50 facing right
Explanation:
forces in opposite directions and equal magnitudes counteract each other. in number 2 they face the same direction so they would just be added. in number 4 they oppose each other so would be subtracted
