Question

an object is thrown vertically upward the Rises to a height of 20m what will be the velocitywith which it was thrown upwards?(taking g=10 m/s^2)​

Answer 1

Explanation:

h-20 ,v2-u2=2as,v2=u2+2gh,0=u2+2×-10×20,u2=400,u=20ms-1,v=u+gt,0=20-10×t,t=2s