Solve Motion & Force: Qs 41 & 42 in Image

[siddscool19]

Homework Statement

Q 41 and 42 in the given image.

Homework Equations

Don't know what should be here.

The Attempt at a Solution

I wasn't able to start the question also since I don't know the basics of these questions but still these are coming in our entrance exams.

 

[Redbelly98]

Homework Equations

Don't know what should be here.

Welcome to PF.

Generally, we do want to see people list relevant equations and give a try at solving the problem before getting help.

That being said, these problems involve conservation of energy, kinetic energy, and/or potential energy. What equation(s) are related to those concepts?