Agricultural Education — Examination Papers, 1886. xxiii 
Show in a diagram a combination of one fixed and one movable 
pulley, employed to raise a weight ; if the weight is 200 lbs., find the 
power required to lift it. 
4. A cylinder of given dimensions stands upright on a plane which 
is gradually made to incline at a greater and greater angle to the 
horizon ; the roughness is sufficient to prevent sliding ; show in a 
diagram the slope of the plane when the cylinder is just about to 
topple over. 
6. A body moves from rest in a straight line under the action of a 
constant force ; in the first three seconds of its motion it passes over 
18 feet ; at the end of the first five seconds, what distance has it 
described and how fast is it moving ? 
6. Two bodies, whose weights are 10 lbs. and 12 lbs., are con- 
nected by a fine thread which rests on a smooth fixed point, so that 
one body hangs down on one side, and one on the other. If the 
bodies are allowed to move, what is the numerical value of the mass 
moved, what of the force producing the motion, and what of the 
velocity gained per second by each of the bodies ? 
7. Explain briefly the action of the common forcing pump. 
If the area of the cross section of the plunger is 25 sq. in., and 
water has to be forced to a height of 50 ft. above the lower end of 
the plunger, what force must be applied to the plunger ? 
N.B. — You may take 28 cubic inches of water to weigh a pound. 
8. Define the specific gravity of a solid or liquid. 
A body weighs 400 grains in vacuo ; its specific gravity is 8 ; hov.' 
tmany grains will it weigh in water (sp. gr, 1), and how many in a 
liquid whose specific gravity is 0-9 ? 
9. What does the height of the mercurial column of a barometer 
imeasure ? 
If the barometer becomes faulty in consequence of some air getting 
into the space above the mercury, what does the height of the column 
now measure ? 
10. Describe briefly the governor and throttle valve of a steam- 
engine, and their action. What is the use of these parts of the 
.engine ? 
