Figure 1
Figure 1 shows the image of a gold pendant which has height 2cm. The pendant is modelled by a solid of revolution of a curve about the -axis. The curve has parametric equations
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Figure 1
Figure 1 shows the image of a gold pendant which has height 2cm. The pendant is modelled by a solid of revolution of a curve about the -axis. The curve has parametric equations
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Figure 1
A student wants to make plastic chess pieces using a 3D printer. Figure 1 shows the central vertical cross-section of the student’s design for one chess piece. The plastic chess piece is formed by rotating the region bounded by the -axis, the -axis, the line with equation = 1, the curve and the curve through 360° about the -axis.
The point A has coordinates (1, 0.5) and the point B has coordinates (0.5, 2.5) where the units are centimetres.
The curve is modelled by the equation
The curve is modelled to be an arc of the circle with centre (0, 3).
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Figure 1 shows the central vertical cross section of a paddling pool that has a circular horizontal cross section. Measurements of the diameters of the top and bottom of the paddling pool have been taken in order to estimate the volume of water that the paddling pool can contain.
Using these measurements, the curve is modelled by the equation
as shown in Figure 2.
The pool is being filled with water from a tap.
Given that the pool is being filled at a constant rate of 15 litres every minute,
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