so I got the answer for number 16 which is 7.00 number 17 the answer is 4.469 bu

Question

so I got the answer for number 16 which is 7.00 number 17 the answer is 4.469 but for number 18 I don't seem to be getting the right number can anyone help?

Question 16, chap 6, sect 6. part 1 of 3 10 points A block starts at rest and slides down a fric tionless track (as shown in the figure below). It leaves the track horizontally, flies through the air, and subsequently strikes the ground. The acceleration of gravity is 9.81 m/s 570 g What is the speed v of the ball when it leaves the track? Answer in units of m/s. Question 17, chap 6, sect 6. part 2 of 310 points What is the horizontal distance : the block travels in the air? Answer in units of m. Question 18, chap 6, sect 6. part 3 of 3 10 points What is the speed of the block when it hits the ground? A nswer in units of m/s.

Explanation / Answer

Problem 18)

Speed when it reaches the ground,

Kf = Ui

0.5 m vf2 = m g h22

vf = sqrt( 2 g h2) = sqrt( 2 x 9.81 x 2) = 6.26 m/s

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