Answer:
10 N
Explanation:
We are given that
Weight of block of metal in air=40 N
Actual weight of object=Weight of object in air
Actual weight of block of metal=40 N
Apparent weight of block of metal=Weight of block in water
Weight of block in water=30 N
Apparent weight of block=30 N
Density of water=1000 kg /cubic meter
We have to find the buoyant force on the block due to water.
Buoyant force=Actual weight-apparent weight
Buoyant force on the block due to water=40-30=10 N
Hence, the buoyant force on the block due to the water=10 N