Energy and simple machines

Which type of energy is primarily derived from the movement of electrons through a conductor?

• Kinetic Energy

• Chemical Energy

• Electric Energy

• Potential Energy

A car with a mass of 1,200 kg is traveling at 25 m/s. What is its kinetic energy?

• 150,000 J

• 375,000 J

• 300,000 J

• 750,000 J

Which of the following energy sources is considered non-renewable?

• Solar Energy

• Geothermal Energy

• Natural Gas

• Wind Energy

In which of the following cases is potential energy the highest?

• A 2 kg object at 2 m height

• A 5 kg object at 1 m height

• A 1 kg object at 5 m height

• A 4 kg object at 3 m height

Which energy source depends on organic materials such as plant matter and animal waste?

• Biomass Energy

• Nuclear Energy

• Geothermal Energy

• Hydropower

An eagle is gliding at a height of 15 meters above the ground with a constant speed of 25 m/s. If the eagle's mass is 6 kg, what is the total mechanical energy of the eagle? (Use gravitational acceleration g=10 m/s)

• 2,875 J

• 3,750 J

• 2,775 J

• 5,500 J

What is the velocity of an object if its kinetic energy is 250 J and mass is 10 kg?

• 7 m/s

• 5 m/s

• 10 m/s

• 15 m/s

Which of the following is an example of a second-class lever?

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Which type of pulley changes only the direction of the force without reducing the effort needed?

• Fixed Pulley

• Movable Pulley

• Compound Pulley

• Block and Tackle

How much force is needed to lift a 500 N load using a compound pulley with 4 supporting ropes?

• 125 N

• 250 N

• 1000 N

• 2000 N