3. A cube of Brass (B = 70 GPa) measuring 1.0 m on each side issubmerged under water. It is lowerd to a depth where a force \"F\" isacting perpendicularly into each side, reduces the cube's volume by1.8 %.
(a) Calculate the size of this force.
2.A researcher examines a piece of fresh human cartilage, withan area of 1.9 cm2. She observes that when subjected to a tensileforce of 194 N it stretches by 4.8 %.
(a) Calculate the elastic modulus of cartilage.
1. A student pushes on the end of a helical spring, which inturn presses a 1.25 kg, wooden block onto a vertical wall. Thecoefficient of static friction between the block and wall is 0.5.She compresses the spring 5.2 cm.
(a) Calculate the minimum spring constant necessaary to preventthe block from sliding down the wall.
