SAMPLE PROBLEMS & SOLUTIONS

Q.1.A ladder with a mass of M and a length of 2L standing on a frictionless ground touches to a frictionless wall (see fig.1). Initially, the angle between the ladder and the ground is alpha. If the ladder is set free, what does the angle become while the ladder leaves the wall?

Ladder_figure
(fig.1)

A.1.
Answer by traditional approach
Answer by intelligent approach

Q.1.Prove the Snell's Law.
(Snell's Law: The ratio of sines of the angles of incidence and refraction is a constant.)

(fig.2)

A.2.
Answer by traditional approach
Answer by intelligent approach

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