5. an object has a momentum of 4,000 kg-m/s and a mass of 115 kg. it crashes into another object that has a mass of 100 kg, and the two objects stick together. if the momentum is conserved, what is the new velocity of the combined object? round to the nearest hundredth.
a. 34.78 m/s
b. 15.82 m/s
c. 69.56 m/s
d. 18.60 m/s

Ablock of mass m slides on a horizontal frictionless table with an initial speed v0 . it then compresses a spring of force constant k and is brought to rest. the acceleration of gravity is 9.8 m/s2. how much is the spring compressed x from its natural length? 1) x = v0*sqrt(k/(mg)) 2) x=v0*sqrt(m/k) 3) x=v0*((mk)/g) 4) x=v0*sqrt(k/m) 5) x=v0*(m/kg) 6) x=v0*sqrt((mg)/k) 7) x=(v0)^2/(2g) 8) x=v0*(k/(mg)) 9) x=(v0)^2/(2m) 10) x=v0*((mg)/k)