Answer:
option C (1 and 4)
Explanation:
Like poles repel each other, unlike poles attract each other
In that case, their momentum must be equal.
So, m1v1 = m2v2
20 * 20 = 40 * v2
v2 = 400 / 40
v2 = 10
In short, Your Answer would be: 10 m/s
Hope this helps!
The force applied to the cannonball and cannon is equal. The explosion inside the cannon will generate a pressure which will turn into a force on both cannonball and cannon. The cannon being heavier and fixed to the ground will move a bit, but the cannonball will be thrown away, fired.
Answer:
low risk for tissue damage
uses radio waves
the last three are not correct
:)
Distance, since distance represents how far something has travelled, which would be in our case 2.5m.
