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3. An object movea in two dimenaiona according to thia poaition vector aa a function of time F(t) 20ti + 45tj - 4.9tj (in metera) a. Determine the velocity of the object aa a function of time b. Determine the objecta initial apeed at t0 a o. Show that the polar angle giving the direction of the objecta initial velocity ia 66 d. What ia the objecta acceleration vector at t- 3 a? e. How far in the x-direction does the object move in 3 seconda? f. What ia the objecta maximum, poaitive y poaition? Anawer: 103 m 4. A Hollywood movie company needa technical aupport for a atunt Tom Cruiae wants to perform. Cruiae (modeled aa a dot) muat run off the roof of one building and juat barely reach the corner of a lower building. See the following figure Develop the equation for the apeed neceaaary for Tom Cruise to juat reach the lower building. Expreaa your anawer only in terma of the labeled diatancea numerical conatanta and g, the acceleration due to gravity

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