Match the following: Column A Column B 1. The motion of a football, when kicked, is due to a. greater pressure 2. Falling of raindrop on the ground is caused by b. muscular force 3. Broad straps of school bags exert c. gravitational force 4. Liquid pressure increases with d. less pressure 5. Smaller surface area exerts e. increase in depth

1. The motion of a football, when kicked, is due to - b. muscular force A force that requires the movement of the muscles of our body is called muscular force. Kicking is an example of muscular force. To kick the football, our foot has to come in contact with the football, so it is a contact force. 2. Falling of raindrops on the ground is caused by - c. gravitational force Falling of raindrops on the ground is caused by gravitational force. In the Universe, every object is pulling every other object towards itself. This force of attraction is called gravitational force. There is no contact between the raindrop and the ground when the force is acting, hence gravitational force is a non-contact force. 3. Broad straps of school bags exert - d. less pressure Pressure is inversely proportional to the area of contact. Broad straps exert less pressure on the shoulders because the surface area is more compared to thin straps. 4. Liquid pressure increases with - e. increase in depth The deeper we go into the water, there is more water above us. Therefore, the weight of water above increases, causing an increase in pressure. 5. Smaller surface area exerts - a. greater pressure Pressure = Force Area Pressure is inversely proportional to the area of contact. Therefore, as the area of contact decreases, pressure increases. Column A Column B 1. The motion of a football, when kicked, is due to b. muscular force 2. Falling of raindrop on the ground is caused by c. gravitational force 3. Broad straps of school bags exert d. less pressure 4. Liquid pressure increases with e. increase in depth 5. Smaller surface area exerts a. greater pressure

E M B I B E

Expanded Universal Science>Chapter 11 - Force and Pressure>ASSESSMENT ZONE>Q D

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8th CBSE

IMPORTANT

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Give one word for: Force acting per unit area.

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Important Questions on Force and Pressure

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8th CBSE

IMPORTANT

Expanded Universal Science>Chapter 11 - Force and Pressure>ASSESSMENT ZONE>Q D

Name the force between two charged bodies.

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8th CBSE

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Expanded Universal Science>Chapter 11 - Force and Pressure>ASSESSMENT ZONE>Q D

Give one word for: Force exerted by a machine. (choose from: Chemical force, Mechanical force, Thermal force)

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8th CBSE

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Expanded Universal Science>Chapter 11 - Force and Pressure>ASSESSMENT ZONE>Q E

Match the following:

Column A	Column B
1. The motion of a football, when kicked, is due to	a. greater pressure
2. Falling of raindrop on the ground is caused by	b. muscular force
3. Broad straps of school bags exert	c. gravitational force
4. Liquid pressure increases with	d. less pressure
5. Smaller surface area exerts	e. increase in depth