Physics Problems With Solutions Mechanics For Olympiads And Contests Link -

:

A 2 kg ball collides elastically with a 3 kg ball at rest. The initial velocity of the 2 kg ball is 5 m/s. Find the final velocities of both balls. : A 2 kg ball collides elastically with

Using the equation for elastic collisions: v'₁ = (m₁ - m₂)v₁ / (m₁ + m₂) v'₁ = (2 - 3)(5) / (2 + 3) = -1 m/s Using the equation for elastic collisions: v'₁ =

A block of mass 2 kg is placed on a horizontal surface. A force of 10 N is applied to the block, causing it to accelerate at 3 m/s². Find the coefficient of friction. Using Newton's second law: F - f =

Using Newton's second law: F - f = ma 10 - f = 2(3) f = 4 N

:

Using the equation: f = μN 4 = μ(2)(10) μ = 0.2