7) A body of mass m, rests on a smooth inclined plane and is attached by a light string over a frictionless pulley to a mass
m, as shown in the diagram.
a) Reproduce the diagram in your answer book and label
the forces acting on the mass m.
b) If mass m, = 25.0 kg and m2 = 6.0 kg, calculate the
tension in the string.
(4 marks)
m.
ms
30°
U11
1
Doterm
anale that the path

Adiver named jacques observes a bubble of air rising from the bottom of a lake (where the absolute pressure is 3.50 atm) to the surface (where the pressure is 1.00 atm). the temperature at the bottom is 4.00 ∘c, and the temperature at the surface is 23.0 ∘c. what is the ratio of the volume of the bubble as it reaches the surface (vs) to its volume at the bottom (vb)? if jaques were to hold his breath the air in his lungs would be kept at a constant temperature. would it be safe for jacques to hold his breath while ascending from the bottom of the lake to the surface?