Question

Allen

大一普物 請問第10題要怎麼寫？ 尤其是(b)的角度表示我不太會

V         1

Vy

A basketba]l player is 15 f horizontally from the center Of the basket, which is 10 了 of ffhe ground. At
whatcangle should the player aim the ball from a height of 8.2 ft with a speed of 26 ft/s2

A diver leaves a 3-m board on atrajectory that takes her 2.5 m above the board and then into the wafter
~.8m horizontally from the end ofthe board. At whatspeedl and angle did she leave the board?

(3) Show that the position of a particle on a circele_of radius AR With_its center at the origin 1s

品 (eos 你+sin 97 。Where @ is theangle the position vector makes with thex-axis. (b) Ifthe particle

is                                                   同            自          全
Inoves-with-constant' Speed y Starting on the x-axis at / 三0, find an expression for 9 interms oftime7
and the period 7/to complete a full circle. (c) Find the magnitude and direction of the acceleration.

訂上若

殉 81 m horizontally from the cnd ofthe board. At What Speece ancC 2
品 彌

I0. (a) Show that the position Of a particle on a circle of Tadius 有 With_its center at the orlgin 35
torinakes With thex-axis. (b) Ithe particle

了       =和[cos 你+sin 放下  where 9 istheangle the position vec

jmoves with_constant speed jstarting On the 立 -axis at /二0,find an expression for 9 interms otttme 在
and fhe period 7-to complete a fu circle. (c) Find the magnitude and direction ofthe acceleratton-
未條