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CBSE Class 8  >  Class 8 Test  >  Science   >  Test: Force & Pressure- 1 - Class 8 MCQ

Force & Pressure- 1 - Class 8 Science Free MCQ Test with solutions


MCQ Practice Test & Solutions: Test: Force & Pressure- 1 (10 Questions)

You can prepare effectively for Class 8 Science Class 8 with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Force & Pressure- 1". These 10 questions have been designed by the experts with the latest curriculum of Class 8 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 10 minutes
  • - Number of Questions: 10

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Test: Force & Pressure- 1 - Question 1
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Force acting per unit area is called

Detailed Solution: Question 1

  • Force acting per unit area is termed as pressure.
  • Pressure = force/ area on which it acts
  • As area is in the denominator So, the smaller the area, larger the pressure on a surface for the same force.

Therefore, the correct answer is C: Pressure.

Test: Force & Pressure- 1 - Question 2
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Muscular force is also called ___________ force.

Detailed Solution: Question 2

Muscular force is called contact force 

  • Muscular force involves using muscles to push, pull, or lift objects.
  • This type of force requires physical interaction with an object, meaning direct contact is necessary.
  • Examples include lifting a book, kicking a ball, or pulling a rope.
  • Contact forces, like muscular force, arise from physical interactions, distinguishing them from non-contact forces such as gravity or magnetism.

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Test: Force & Pressure- 1 - Question 3
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Why does an inflated balloon stick to a wall after being rubbed with a synthetic cloth?

Detailed Solution: Question 3

When a balloon is rubbed with a synthetic cloth, it becomes electrically charged due to friction. This charge creates an electrostatic force The balloon sticks to the wall because opposite charges attract.

Test: Force & Pressure- 1 - Question 4
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When a load is suspended from a spring, what happens to the spring?

Detailed Solution: Question 4

When a load is suspended, the force of gravity pulls the load downward, stretching the spring. The spring resists this stretching by exerting an equal and opposite restoring force, as per elastic behavior.

Test: Force & Pressure- 1 - Question 5
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When a rocket is fired upwards, what forces act on it immediately after leaving the launch pad?

Detailed Solution: Question 5

The correct answer is Option B - gravitational and frictional force

Gravity acts on any mass near the Earth and pulls it toward the centre of the Earth; this pull is commonly called weight.

Frictional force in this context means air resistance, which acts opposite to the direction of motion when an object moves through the atmosphere.

Weight = mg

Magnetic and electrostatic forces do not generally produce significant effects on a neutral vehicle in flight, so they are not considered here.

Also, the engines provide thrust that propels the vehicle upward; the two forces listed in the answer (weight and air resistance) are the external forces that oppose this motion.

Test: Force & Pressure- 1 - Question 6
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State whether the following statement is True or False:

When you push a ball gently along a level surface, it does not move.

Detailed Solution: Question 6

The statement is False.

When you push a ball gently along a level surface, it does move, even if only slightly. The movement depends on factors like the force applied, friction, and the smoothness of the surface.

Test: Force & Pressure- 1 - Question 7
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Why do the forces acting on a held plastic bucket not change its state of motion?

Detailed Solution: Question 7

When a plastic bucket is held, the forces acting on it are balanced:

  • Gravitational force pulls the bucket downward.
  • The muscular force from the person holding the bucket pushes upward.

Since these forces are equal in magnitude and opposite in direction, they cancel each other out, preventing any change in the bucket's state of motion (i.e., it remains at rest). This is why the bucket does not move.

Test: Force & Pressure- 1 - Question 8
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State whether the following statement is True or False:

A magnet can exert a force on another magnet without being in contact with it.

Detailed Solution: Question 8

  • Yes, magnets can exert a force on other magnets without touching them. This is because magnetic force is a non-contact force, meaning it can pull or push objects without physically touching them.
  • Magnets have a magnetic field that surrounds them, with lines of force extending from the north pole to the south pole. 
  • This field allows magnets to interact with each other, even when they're not touching.

Test: Force & Pressure- 1 - Question 9
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What force does an athlete exert when making a high jump?

Detailed Solution: Question 9

When the athlete pushes the ground with their feet, they apply a contact force on the ground; the ground responds by exerting an equal and opposite force on the athlete. This response force from the ground is called the normal reaction.

Because of Newton's third law, the normal reaction acts upward on the athlete. If this upward reaction is momentarily greater than the athlete's weight, the athlete accelerates upward and rises.

So, option (a) is the correct answer.

Test: Force & Pressure- 1 - Question 10
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When pressing the bulb of a dropper with its nozzle in water, what causes water to rise in the dropper when pressure is released?

Detailed Solution: Question 10

Correct Answer- Option D

When the bulb of the dropper is pressed, the air inside is forced out. Upon releasing the pressure, the atmospheric pressure acting on the surface of the water pushes the water into the dropper. This is because the pressure inside the dropper becomes lower than the pressure outside, causing water to rise in the dropper.

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About this Class 8 Practice Test

This test contains 10 MCQs on Force & Pressure- 1 with detailed solutions for each question. It is part of the Science Class 8 course on EduRev, designed to align with the current Class 8 syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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