Object a of mass m is released from height h, whereas object b of mass 0.5m is released from height 2h. what is the ratio of the velocity of object a to that of object b immediately before they hit the ground?
a. 1: 2
b. 1.41 : 1
c. 1: 1.41
d. 1: 4
e. 1: 1

To use anything transparent

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.