a body is projected horizontally from the top of tower with a velocity of 20 m per second after what time the vertical component of velocity
Hello Aspirant,
Please provide complete information regarding your question. Your question seems incomplete. You have to provide the height of the tower if want to know the vertical component of velocity when the body comes to the ground. You can use the newton's equations to calculate the final velocity taking initial velocity as zero as initially the body has only horizontal velocity and zero vertical velocity.
Good Luck !!!