Question

A raft is 4.2 m wide and 6.5 m long and it floats on water (density of water = 1000 kg/m3). When a horse is loaded onto the raft, it sinks an additional 0.027 m deeper into the water. What is the weight of the horse (in N)?
mass of horse
= mass of water displaced (Archimedes principle)
= 0.027*4.2*6.5 m^3 * 1000 kg/m^3
= 737.1 kg

Weight of horse
= mg
= 737.1 * 9.81 N
= 7230 N

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