40.0° 8) An object moves in a çircle of radius R at constant speed with a period T. You want to change only the period in order to cut the object's acceleration in half, Find the new period. ANS T2. to elp bira A A(E 0.0 rans bnucnp ebulinghm moo.rb sdhed aeveol 9) A hiker throws a stone from the upper JA (Cedge of a vertical cliff. The stone's Sbruinitial velocity is 25.0 m/s directed at Ihed orT ie TT e'lle 25.0 m/s Cliff 40.0° with the face of the cliff, as. ewanA shown in the figure. The stone hits the alelitosic ground 3.75 s after being thrown and mo bon eliesio1o feels no appreciable air resistance as amoo ioolev. isiti it falls. (a) What is the height of the cliff? (141 m). How far from the foot Ground of the cliff does the stone land? (60.3 m). How fast is the stone moving just before it hits the ground? (58.2 m/s) hiotjo emi enT 10) The speed of a projectile when it reaches its maximum height is one-half of its speed when it is at a half its maximum height. What is the initial projection angle of the projectile? Ignore air resistance. (67.8°) Slo offenipho ent to dhor n vibab 2i nO

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Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.