Science 6- Forces and Energy

What force pulls a mango down to the ground?

• Energy

• Force

• Friction

• Gravity

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Why is it easier for a car to travel in going down than in going up the slope?

• Because all objects are attracted toward the center of the Earth due to gravity.

• Because of the magnetic force that magnetized the car to go down easier.

• Because the car becomes heavier when moving up than going down.

• Because the frictional force causes the car harder to moves up.

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How can you best reduce friction between the bottom furniture and the floor?

• by smoothing the floor

• by keeping furniture on their place

• by applying lubricants like wax on the floor

• by putting wheels or rollers on the bottom or feet of furniture

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Why is it easy to slip when there is water on a smooth floor?

• The water is a lubricant and reduces the friction between your feet and the floor.

• The friction between your feet and the floor changes from sliding.

• The water increases the friction between your feet and the floor.

• The friction between your feet and the floor are nothing do with water.

Which has the greatest friction?

• wet floor

• polished floor

• tiled floor

• rough floor

What kind of friction is acting on the boat sailing on the sea to slow down?

• Fluid friction

• Rolling friction

• Sliding friction

• Static friction

Which of the following statements has the correct concept on Potential and Kinetic energy?

• Potential energy is energy that is stored in an object at rest, while Kinetic energy is energy in motion.

• Potential energy is energy in motion, while Kinetic energy is energy at rest.

• Potential and Kinetic energy are both energies stored in an object.

• Potential and Kinetic energy are both energies in motion.

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What kind of energy are coal, gasoline, petroleum and firewood contained?

• Chemical Energy

• Electrical Energy

• Radiant Energy

• Thermal Energy

What form of energy is needed in drying clothes?

• Chemical Energy

• Mechanical Energy

• Radiant Energy

• Sound Energy

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Which of the following energy transformation takes place when your mother is using a washing machine?

• Electrical to chemical

• Electrical to mechanical

• electrical to sound

• electrical to thermal