Exploring Forces Class 8 Assertion and Reason Questions

Exploring Forces Class 8 Assertion and Reason Questions

Exploring Forces Class 8 Assertion and Reason Questions

Following questions are of Assertion (A), Reason (R) type questions. Choose the correct answer from the following options:

(a) Both A and R are true, and R is the correct explanation of A.

(b) Both A and R are true, but R is not the correct explanation of A.

(c) A is true, but R is false.

(d) A is false, but R is true.

1. (A): A force is required to change the speed of an object.

(R): An object in motion will remain in motion unless acted upon by an external force.

Answer:

(a) Both A and R are true, and R is the correct explanation of A.

2. (A): Friction always acts in the direction opposite to the motion of an object.

(R): Friction is a contact force that arises when two surfaces interact.

Answer:

(a) Both A and R are true, and R is the correct explanation of A.

3. (A): The weight of an object on the Moon is one-sixth of its weight on Earth.

(R): The mass of an object remains unchanged regardless of its location.

Answer:

(a) Both A and R are true, and R is the correct explanation of A.

4. (A): A ball thrown upwards will eventually stop and fall back down.

(R): The force of gravity acts downward on the ball at all times.

Answer:

(a) Both A and R are true, and R is the correct explanation of A.

5. (A): A smooth surface reduces friction.

(R) Friction is directly proportional to the surface area in contact.

Answer:

(c) A is true, but R is false.