Question1
A solid piece of copper and a solid piece of aluminium have the same mass. If the density of copper is 8.9 grams/cm3 and the density of aluminium is 2.7 grams/cm3, which of following statements is right
A) Both objects will have the similar volume.
B) The volume of copper piece is larger than that of the copper piece.
C) The volume of aluminium piece is larger than that of the copper piece or
D) Not enough information is provided in order to compare the two volumes.
Describe your answer using examples or evidence
Question2
A 360 kg mass is supported on a wire attached to a 15 m long steel bar that is pivoted at a vertical wall and supported by a cable. The mass of the bar is 98 kg. (Take right and up to be positive.)
(a) With the cable attached to the bar 5.0 m from the lower end as shown, find out the tension in the cable.
(b) Find out the force exerted by the wall on the steel bar.