Aroller coaster in the figure below starts at the top of a straight track that is inclined 30° with the horizontal. this causes it to accelerate at a rate of 4.9 m/s2 (1/2 g).

what is the roller coaster's speed after 5 s? in m/s.

(b) how far does it travel during that time?

Initial velocity,  u = 4.9 m/sfinal velocity = v m/sinitial height,  h₁ =  245 m    final height, h₂ = 0a = -9.8  m/s²time taken = t secondss = ut + 0.5at²⇒  (h₂-h₁) = ut + 0.5at²⇒  0-245 = 4.9t + 0.5×(-9.8)×t²⇒ -245 = 4.9t - 4.9t²⇒ 4.9t² -4.9t -245 =0solving it, we get   t = 7.59sv  = u +  at = 4.9 -9.8×7.59 = 4.9 - 74.38 = -69.48 m/svelocity is  69.48 m/s downward

The big glowy thing is called the sun it is a star in our galaxy and is over 1 million degrees