1.A $5\text{ kg}$ body is acted upon by a constant force of $20\text{ N}$. Find acceleration and velocity after $4\text{ s}$ starting from rest.
2.State Newton's second law and show that $F = ma$.
3.A block of mass $m=2\text{ kg}$ rests on a horizontal plane with coefficient of static friction $\mu_s = 0.4$. Find maximum static friction force.
4.Calculate tension $T$ in a rope lifting a mass of $10\text{ kg}$ upwards with acceleration $a=2\text{ m/s}^2$.
