An ideal spring is used to fire a 15 0-g block horizontally across a frictionless table top The spring - Physics - Work Energy And Power

Question

An ideal spring is used to fire a 15 0-g block horizontally across
a frictionless table top The spring has a spring constant of 20 N/m
and is initially compressed by 7 0 cm The speed of the blockas it
leaves the spring is

Ravi Gupta · Accepted Answer

potential energy of the spring = kinetic energy of the block12kx2 = 12mv2v = kmx=20×100015×0
07=2 55 m/s

An ideal spring is used to fire a 15.0-g block horizontally across a frictionless table top. The spring has a spring constant of 20 N/m and is initially compressed by 7.0 cm. The speed of the blockas it leaves the spring is