Answer:
Tension T = 13.14N
Explanation:
Given:
Mass of rock m = 1.50kg
Density of rock p = 4700kg/m^3
Volume of rock V = mass/density = m/p
V = 1.50kg/4700kg/m3 = 3.19×10^-4m3
Taking the summation of forces acting on the rock;
T-W+Fb = 0
T = W - Fb .....1
T = tension
W = weight of rock
Fb = buoyant force
Fb = pw(0.5V)g = density of water × Volume under water×™ acceleration due to gravity
g = 9.8m/s^2
T = mg - pw(0.5V)g
T = 1.50×9.8 - 1000kg/m^3 ×0.5(3.19 × 10^-4) × 9.8
T = 13.14N
