The mass on a spring has a mass of 1.25 kg. If the spring constant is 250 N/m, what is the period of the mass spring system? What is the frequency? [0.44 s, 2.3 Hz]

World class speed skaters can skate a 3,000-m course in about 4 minutes.what is their average speed for this course? a. 12.5 m/sb. 1.33 m/sc. 1.25 m/sd. 13.3 m/s

2. -/1 pointsserpse10 2.7.p.017.mi. an object moving with uniform acceleration has a velocity of 14.0 cm/s in the positive x direction when its x coordinate is 2.97 cm. if its x coordinate 2.85 s later is -5.00 cm, what is its acceleration? cm/s2 need ? read it master it

Of is j/kg·k. if a 2.6 kg of isk to k,is ?