[填空题]
The Sun's gravitational pullf - 9ym (w0j6 q;w5j8kux mk;l6hbjddu on the Eart. l 52yzweu5jfr3nf8 c0avx t7h is much larger than the Moon's. Yet the Moon's is mainly responsible for the tides. Explain. [Hint: Consider the difference in gravitational pull from one side of the Earth to the other.]A child sitting 1.10 m from the center 2xc5fzy0a.8u3j rw 57tln ef vof a merry-go-round moves with a speed of 1.25 $\mathrm{~m} / \mathrm{s}$ . Calculate (a) the centripetal acceleration of the child,
(b) the net horizontal force exerted on the child ( mass =25.0 $\mathrm{~kg}$)
