Answer:All balls have same velocity
Explanation:
Ball A
horizontal velocity
vertical velocity
let h be the height of building
Vertical velocity acquired by Ball A
Velocity just before hitting ground=
Ball B
launched with velocity u at angle of 45 above horizontal
horizontal velocity will remain same as there is no acceleration in that direction
vertical velocity just before hitting the floor
Final velocity before hitting ground
Ball C
horizontal velocity will remain same as there is no acceleration in that direction
vertical velocity just before hitting the floor
Final velocity before hitting ground
Thus all three balls will have same final velocity.
Answer:
Those are the best electricity conductors that we can use to span large distances with large amounts of power. Its also alot cheaper to use copper wire than other kinds of metals. not to mention copper can bend easily and that makes the job of putting on wires alot faster and easier.
False
Explantion: Energy is neither generated nor lost and can only be transferred from one form to another. But all energy is not transformed from one form to another. Some of the energy is radiated in the form of heat.
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Answer:
1.3m/s²
Explanation:
Given values in the first part: acceleration a, time t₁:
1) velocity v₀
2) height h₀
Given values in the second part: acceleration -g, time t₂:
3) height h
Combining equations 1,2,3 and setting h to zero:
Solve for a with t₁ = 4s and t₂=2.1s: