Answer:
Height = 0.25 metres
Speed = 3.26 m/s
Explanation:
Kinetic energy = 17 joules
Mechanical energy = 25
Potential energy = 25-27 = 8
Potential energy PE = m*g*h
8 = 3.2x9.81xh
8 = 31.392h
We divide through by the value of h to get height
8/31.392 = h
h = 0.25 metres
We solve for speed = velocity
Kinetic Energy = 1/2mv²
17 = 0.5x3.2xV²
17 = 1.6v²
V² = 17/1.6
V² = 10.625
V = √10.625
Velocity = 3.26m/s
