Aseaside cliff is 30 m above the ocean surface, and sam is standing at the edge of the cliff. sam has three identical stones. the first stone he throws off the cliff at 30° above the horizontal. the second stone he throws vertically downward into the ocean. the third stone he drops into the ocean.
1. in terms of magnitude, which stone has the largest change in its velocity over a one second time interval after its release? (sam’s throwing speed is 10 m/s.)

In terms of magnitude, the stones 2 and 3 have the largest change in its velocity over a one second time interval after their release.

Explanation:

Stone 1:

vi = 10 m/s

vix = vi*Cos ∅ = (10 m/s)*Cos 30° = 8.66 m/s = vx

viy = vi*Sin ∅ = (10 m/s)*Sin 30° = 5 m/s

vy = viy - g*t = (5 m/s) - (9.8m/s²)*(1 s) = -4.8

then

v = √(vx²+vy²) = √((8.66)²+(-4.8)²) = 9.90 m/s

Δv = v - vi = 9.902 m/s - 10 m/s

⇒  Δv = -0.098 m/s

Stone 2:

vi = 10 m/s

v = vi + g*t = (10 m/s) + (9.8m/s²)*(1 s) = 19.8 m/s

Δv = v - vi = (19.8 m/s) - (10 m/s)

⇒  Δv = 9.8 m/s

Stone 3:

vi = 0 m/s

v = g*t = (9.8m/s²)*(1 s) = 9.8 m/s

Δv = v - vi = (9.8 m/s) - (0 m/s)

⇒  Δv = 9.8 m/s

Finally, in terms of magnitude, the stones 2 and 3 have the largest change in its velocity over a one second time interval after their release.

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answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.