[填空题]
A vertical spring (ignore its mass), whoqvgw/k gbvuf ;*w3weida. )/ *se spring stiffness constanta:po/xeva , (7rq./tzy rdrcy:0. fao is 950N/m is attached to a table and is compressed down 0.150 m. (a) What upward speed can it give to a 0.30-kg ball when releasedr0ory,.af yvq(c:op7t xa dza.//er: ? m/s
(b) How high above its original position (spring compressed) will the ball fly? m