Answer:
(a) The recoil velocity of the squid is 0.5 m/s
(b) W = 0.25 J
Explanation:
(a)
Momentum of the squid = momentum of the fluid
MV = mv
Where M = mass of the squid, V = recoil velocity of the squid, m = mass of the fluid, v = recoil velocity of the fluid.
Making V the subject of formula,
V = mv/M
Where m = 0.25 kg, M = 5.00 kg, v = 10 m/s
V = (0.25 × 10)/5
V = 0.5 m/s
The recoil velocity of the squid is 0.5 m/s
(b)
Work done against friction (W) = Frictional force(F) × Distance(d)
W = F ×d.................... Equation 2
Where F = 5.0N, d = distance.
d = velocity × time
Where Velocity = 0.5 m/s, Time = 0.1 s
∴ d = 0.5 × 0.1 = 0.05 m
Substituting these values into equation 2,
W = 5 × 0.05
W = 0.25 J
Therefore 0.25 J of energy is lost to the work done against friction.
