Question

A spring gun is mounted on a lab table such that its muzzle is level with the surface of the table and pointed up into the air. A ball with mass 80.0 g is loaded into the spring gun, compressing the spring by 8.00 cm. When the trigger is pressed, the ball shoots out vertically into the air, reaches a maximum height and falls back down, striking the surface of the table after a total flight of 1.20 seconds. Use g = 9.80 m/s. Assuming all the energy stored in the spring is transferred to the ball, determine the spring constant of the spring.
_______ N/m

Answer 1

Let say, at the moment, when the ball was shot, it has a (vertical) speed = u

mass of the ball = m = 80.0 g = 0.08 Kg = (80/1000) Kg

Time of total flight = T = 1.20 sec

So, at the moment, when the ball was shot, it has a (vertical) speed = u =5.88 m/s

answered by: anonymous