Seorang kanak-kanak bermain bola di luar rumahnya. Apabila dia melambung bola ke atas, bola tersebut akan terjatuh semula ke tanah. Mengapa ? A Daya pecutan menarik bola tersebut ke tanah.
B Bola menarik Bumi mendekatinya.
C Daya graviti Bumi menarik bola tersebut ke tanah.
D Bola dan Bumi saling menarik

Astone dropped into a well is heard to strike the water after 8seconds. find the depth of the well if the velocity of sound is 350m/s

Arocket starts from rest and moves upward from the surface of the earth. for the first 10.0 s of its motion, the vertical acceleration of the rocket is given by ay = 12.80 m/s32t, where the +y-direction is upward. (a) what is the height of the rocket above the surface of the earth at t = 10.0 s? b) what is the speed of the rocket when it is 325 m above the surface of the earth?

A0.750 kg aluminum pan is removed from the stove and plunged into a sink filled with 10.0 kg of water at 293 k. the water temperature quickly rises to 297 k. what was the initial temperature of the aluminum pan? the specific heat of aluminum is ca = 900 j/(kgk) and water is cw = 4190 j/(kgk)