Mechanical Energy (Grade 10 NSC Matric Physical Sciences): Quizzes

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Mechanical Energy
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What is mechanical energy?

Sum of EPE_P and EKE_K

Which formula represents mechanical energy in expanded form?

EM=mgh+12mv2E_M = mgh + \frac{1}{2}mv^2

When is mechanical energy conserved in a system?

Absence of friction/air resistance

What energy does a pendulum have at its highest point?

Max PE, zero KE

What happens to mechanical energy if friction is present?

Not conserved

At maximum height, what is the kinetic energy?

Zero (velocity = 0)

Which equation shows conservation of mechanical energy?

EP1+EK1=EP2+EK2E_{P1} + E_{K1} = E_{P2} + E_{K2}

What is the potential energy at ground level if ground is the reference?

Zero

Does the path taken affect mechanical energy conservation?

No, only start/end positions matter

What often cancels out in mechanical energy conservation problems?

Mass

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