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0309 Exit Ticket (Energy)

Last updated almost 2 years ago

6 Nsɛmmisa

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Asemmisa {{asɛmmisaAhyɛnsode}}

1.

Which of the following statements best describes the principle of conservation of mechanical energy?

The total mechanical energy of an isolated system remains constant if only conservative forces act on it.

The total mechanical energy of a system is always constant, regardless of the forces acting on it.

The mechanical energy of an object is conserved only when non-conservative forces like friction are present.

Asemmisa {{asɛmmisaAhyɛnsode}}

2.

If a pendulum is swinging back and forth in the absence of air resistance, at what point is its kinetic energy at its maximum?

At the highest point of its swing

At the lowest point of its swing

Kinetic energy remains constant throughout the swing

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3.

Which of the following is NOT an example of a situation where mechanical energy is conserved?

A roller coaster moving in a frictionless track

A satellite orbiting Earth in a vacuum

A car driving up a hill with friction acting on it

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4.

A 2 kg block is released from rest at a height of 5 meters above the ground. Assuming no energy is lost to air resistance, what is the speed of the block just before it hits the ground? (Use g = 9.81 m/s²)

7 m/s

9.8 m/s

10 m/s

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5.

A 1 kg mass is moving at a speed of 3 m/s on a frictionless surface when it collides with a spring with a spring constant of 300 N/m. What is the maximum compression of the spring?

0.10m

0.15 m

0.20 m

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6.

A ball is thrown vertically upward. Ignoring air resistance, which of the following is true about the ball’s mechanical energy at its highest point?

The mechanical energy is zero

The mechanical energy is purely kinetic

The mechanical energy is purely potential.