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stellarik [79]
3 years ago
5

7. Two rocks are rolled down a hill at different speeds. At the bottom of the hill is a brick wall. Which rock will hit the bric

k wall with more force? 4 points. Rock 1 Rock 2 mass = 242 kgmass = 321 kg velocity = 24 m/s velocity = 20 m/s2 KE = 1/2m x v2 where m = mass and v = velocity. Please show your calculations.​
Physics
1 answer:
amm18123 years ago
8 0

Answer:

I think first rock is right answer

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sveticcg [70]

Given

v = 343 m/s

ac = 5g

ac = 5*9.8 m/s^2

ac = 49 m/s^2

where,

v: velocity

ac = centripetal aceleration

Procedure

We call the acceleration of an object moving in uniform circular motion—resulting from a net external force—the centripetal acceleration ac; centripetal means “toward the center” or “center seeking”.

Formula

\begin{gathered} a_c=\frac{v^2}{r} \\ r=\frac{v^2}{a_c} \\ r=\frac{(343m/s)^2}{49m/s^2} \\ r=2401\text{ m} \end{gathered}

The minimum radius not to exceed the centripetal acceleration is 2401 m.

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