Question

Key answer in Science 8 Quarter 1-Module 2 :Laws of Motion

Answer 1

Explanation:

Here is your answer hope it helps you

Answer 2

1. Who's principle was the basis of the first law of motion?

a. Alessandro Volta

b. Galileo Galilei

c. Charles Darwin

d. Isaac Newton

2. Which describes the Law of Acceleration?

a. Acceleration is directly proportional to its mass.

b. Acceleration is directly proportional to force.

c. Acceleration is inversely proportional to force.

d. Acceleration is all about the two forces which are equal in size.

3. Suppose a ball having a mass of 0.50 kilogram was hit with a force of 10 Newton. What is its acceleration?

a. 5 m/s2

b. 10 m/s2

c. 20 m/s2

d. 30 m/s2 4.

4. This law states that "For every action, there is an equal and opposite reaction".

a. Law of Inertia

b. Law of Interaction

c. Law of Acceleration

d. Law of Conservation of Energy

5. This law states that "A body at rest will remain at rest or a body in motion will move at constant velocity unless acted upon by an external net or unbalanced force".

a. Law of Interaction

b. Law of Inertia

c. Law of Conservation of Energy

d. Law of Acceleration Goals

1. Sir Isaac Newton’s principle was the basis of the first law of motion, option (d).

• The law of universal gravitation was developed in mechanics as a result of the three principles of motion, which are the foundations of modern physics by Sir Isaac Newton.
• According to Newton's first law, a body that is at rest or traveling in a straight path at a constant speed will continue to do so unless it is subjected to an external force.
• The Law of Inertia is another name for Newton's First Law of Motion.

2. According to the law of acceleration, the acceleration is directly proportional to the force, option (b).

• Newton’s second law is also known as the law of acceleration.
• According to Newton’s second law or the law of acceleration and force, the net force is the product of mass and acceleration, an item under a force accelerates.
• Thus, the acceleration of the item is directly proportional to its force and inversely proportional to its mass.

3. The acceleration of the ball will be equal to 20 m/s2, option (c).

Given:

Force = 10 N

Mass = 0.5 Kg

To Find:

The acceleration.

Solution:

According to Newton’s second law of motion,

Force = Mass x Acceleration

F = ma

Therefore,

a = $\frac{F}{a}$

a = $\frac{10}{0.5}$

a = 20 m/s²

4. For every action there is an equal and opposite reaction is the law of interaction, option (b).

• This is Newton’s third law.
• If object A applies a force to object B, then object B must apply a force to object A in the opposite direction and of equal strength.
• This is also known as the law of interaction.

5. A body at rest will remain at rest or a body in motion will move at constant velocity unless acted upon by an external net or unbalanced force is Newton’s first law of motion also called the law of inertia, option (b).

• According to Newton's first law, a body that is at rest or traveling in a straight path at a constant speed will continue to do so unless it is subjected to an external force.
• The Law of Inertia is another name for Newton's First Law of Motion

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