Physics (10th Edition)

a) 2.99 x $10^{4}$ m/s b) a) 2.69 x $10^{4}$ m/s
a) Distance = $\frac{2\pi\times r}{4}$ = $\frac{2\pi\times 1.50 \times 10^{11}}{4}$ $\approx$ 2.3562 x $10^{11}$ m Average speed = $\frac{2.3562 \times 10^{11}}{7.89 \times 10^{6}}$ $\approx$ 2.99 x $10^{4}$ m/s b) displacement = $\sqrt 2 \times (1.50 \times 10^{11})^{2}$ $\approx$ 2.1213 m Average velocty = $\frac{2.1213 \times 10^{11}}{7.89 \times 10^{6}}$ $\approx$ 2.69 x $10^{4}$ m/s