An Unfinished Road* While chatting on his phone, Joe drives his car at a constan

Question

An Unfinished Road* While chatting on his phone, Joe drives his car at a constant 29 m/s up a 16 degrees bridge ramp, not realizing that the road was never finished. The road ends suddenly when it is a height 12.5 m above the ground. Ignore air drag.

Part C What is the vertical component of the velocity of Joe's car the instant before it strikes the ground? Use up as the positive direction. m/s
Part D What is the horizontal component of the velocity of Joe's car the instant before it strikes the ground? Use right as the positive direction. m/s
Part E What is the speed of Joe's car the instant before it strikes the ground? m/s An Unfinished Road* While chatting on his phone, Joe drives his car at a constant 29 m/s up a 16 degrees bridge ramp, not realizing that the road was never finished. The road ends suddenly when it is a height 12.5 m above the ground. Ignore air drag.

While chatting on his phone, Joe drives his car at a constant 29 m/s up a 16 degrees bridge ramp, not realizing that the road was never finished. The road ends suddenly when it is a height 12.5 m above the ground. Ignore air drag.

Part C What is the vertical component of the velocity of Joe's car the instant before it strikes the ground? Use up as the positive direction. m/s
Part D What is the horizontal component of the velocity of Joe's car the instant before it strikes the ground? Use right as the positive direction. m/s
Part E What is the speed of Joe's car the instant before it strikes the ground? m/s Part C What is the vertical component of the velocity of Joe's car the instant before it strikes the ground? Use up as the positive direction. m/s
Part D What is the horizontal component of the velocity of Joe's car the instant before it strikes the ground? Use right as the positive direction. m/s
Part E What is the speed of Joe's car the instant before it strikes the ground? m/s Part C What is the vertical component of the velocity of Joe's car the instant before it strikes the ground? Use up as the positive direction. m/s
Part C What is the vertical component of the velocity of Joe's car the instant before it strikes the ground? Use up as the positive direction. m/s
m/s
Part D What is the horizontal component of the velocity of Joe's car the instant before it strikes the ground? Use right as the positive direction. m/s
Part D What is the horizontal component of the velocity of Joe's car the instant before it strikes the ground? Use right as the positive direction. m/s
m/s
Part E What is the speed of Joe's car the instant before it strikes the ground? m/s Part E What is the speed of Joe's car the instant before it strikes the ground? m/s m/s

Explanation / Answer

horizontal component of velocity of car = 29cos16 = 27.876 m/s ,

vertical component = 29sin16 = 7.99 m/s ,

C.) v^2 = u^2 + 2*a*s ,

here a= g = 9.8m/s^2 ,

v^2 = 7.99^2 + 2*9.8* 12.5 ,

v= 17.57 m/s (in downward direc ) ,

V (vertical) = - 17.57 m/s Ans

D.) horizontal component remain same , because there is no force in this direction,

so V (horizontal) = 27.876 m/s Ans

E.) V^2 = 17.57^2 + 27.876^2 ,

V(net) = 32.95 m/s Ans.

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