Question

Q. 1. The wooden plank may break if someone stands on it. What will be the reason?​

Answer 1

Dear Student,

✰ Explanation :

Newton's first and third laws applicable ,

→ First law says an object at rest stays at rest unless acted on by an unbalanced force.

→ Third law says that when you exert force to lift the plank (and yourself), you're also exerting equal force down on the plank, which makes those forces balanced.

Answer 2

Answer:

In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.