Below each type of force in the first column write the letters from the other two columns to match. 1 . Gravitational force A. Contact force m. Makes a pencil work B. Noncontact force n. Acts between any two objects 2 . Frictional force o. Always opposes motion p. Can act on iron but not on paper 3 . Magnetic force q. Can act on paper r. A noncontact force that depends on mass 4 . Electrostatic force s. Reduces when a body starts moving t. Prevents objects from flying away from the earth

The gravitational force is a non-contact force. It is a pull force that acts on all the bodies in the universe that have mass. The earth's gravitational pull prevents objects from flying away from the earth's atmosphere. So, 1 - B - n, r, and t is the correct match. The frictional force is a contact force that always opposes the motion of two surfaces on each other. Sliding friction is less than static friction. So, when a body starts moving the force of friction reduces. It makes a pencil to write on a paper due to irregularities. So, 2 - A - m, o, s is the correct match. Magnetic force is a non-contact force that can attract or repel magnet substances. It can attract iron but not paper. So, 3 - B - p is the correct match. The electrostatic force is a non-contact force. When two objects are rubbed with each other like plastic comb and dry hairs, the comb gets charged and it attracts tiny pieces of paper. So, 4 - B - q is the correct match. 1 . Gravitational force B. Non-contact force n. Acts between any two objects r. A non-contact force that depends on mass t. Prevents objects from flying away from the earth 2 . Frictional force A. Contact force m. Makes a pencil work o. Always opposes motion s. Reduces when a body starts moving 3 . Magnetic force B. Non-contact force p. Can act on iron but not on paper 4 . Electrostatic force B. Non-contact force q. Can act on paper

E M B I B E

Basic Science for Class 8>Chapter 8 - Force and Pressure>Exercises>Q D

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8th CBSE

IMPORTANT

Earn 100

Kinetic friction is (lesser/ greater) than static friction.

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Important Questions on Force and Pressure

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8th CBSE

IMPORTANT

Basic Science for Class 8>Chapter 8 - Force and Pressure>Exercises>Q D

The smaller the area over which a force is applied, _____ is the pressure.

(smaller/larger)

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8th CBSE

IMPORTANT

Basic Science for Class 8>Chapter 8 - Force and Pressure>Exercises>Q D

The pressure at a particular depth in a liquid is _____ in every direction.

(equal/different)

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Basic Science for Class 8>Chapter 8 - Force and Pressure>Exercises>Q E

Gravitational force acts _____.

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Basic Science for Class 8>Chapter 8 - Force and Pressure>Exercises>Q E

The relation between the

S I

unit of force and the weight of a

1 k g

mass is

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Basic Science for Class 8>Chapter 8 - Force and Pressure>Exercises>Q E

If a force of

100 N

acts on an area of

10 m^{2}

, the pressure equals

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Basic Science for Class 8>Chapter 8 - Force and Pressure>Exercises>Q E

A car skids on a wet road because _____.

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Basic Science for Class 8>Chapter 8 - Force and Pressure>Exercises>Q E

Which of the following is not true?

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Basic Science for Class 8>Chapter 8 - Force and Pressure>Exercises>Q F

Below each type of force in the first column write the letters from the other two columns to match.

$1 .$ Gravitational force	A. Contact force	m. Makes a pencil work
	B. Noncontact force	n. Acts between any two objects
$2 .$ Frictional force		o. Always opposes motion
		p. Can act on iron but not on paper
$3 .$ Magnetic force		q. Can act on paper
		r. A noncontact force that depends on mass
$4 .$ Electrostatic force		s. Reduces when a body starts moving
		t. Prevents objects from flying away from the earth

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