Answer: v= 5 m/s
Explanation: Solution:
KE= 1/2 mv²
Derive to find v.
v = √ 2KE / m
Substitute the values
v = √2x 625 J / 50 kg
= √ 1250 J / 50 kg
= √ 25 kg. m/s /kg
= 5 m/s
Unit for J can be expressed in kg.m/s so we cancel kg and the remaining unit is m/s.