Can you please do 4 and 5 Guve me just the answer 4. The same ball is thrown hor

Question

Can you please do 4 and 5 Guve me just the answer 4. The same ball is thrown horizontally off a cliff of 100m with a speed of 7 m/s. Ignoring air resistance, which is true of the y-component of its velocity right before it hits the ground? A) It is greater than when it was thrown. B) It is zero. C) It is less than when it was thrown. D) It is thc samc. s,. Consider this position graph of an objecet x (m) 20 10 0 t (s) 4 0 2 At t 3.5 s, the object's velocity is A. 5 m/s B. -20 m/s C. 10 m/s D. -10 m/s E. None of the above

Explanation / Answer

4. as ball comes down vertically, its y -component will increase. because acceleration is in vertical downward direction.

v = vi + a t

Ans: (A)

5. slope of x vs t curve will give us velocity.

slope at 3.5 s,

slope= velocity = (0 - 20)/(4-2) = - 10 m/s

Ans(D) -10 m/s

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