Need an explanation, Prefer pictures of note for problem solving Q11 An archer a

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Need an explanation,

Prefer pictures of note for problem solving

Q11 An archer aims an arrow perfectly horizontally over a flat field and fires the arrow.
At the same time his watch wristband breaks and hits the ground. Which object (the arrow
or the watch) hits the ground first, if either does?
A. The watch because it has no velocity in the x-direction
B. The arrow because the velocity in the x-direction speeds up the fall in the ydirection
C. They hit the ground at the same time because X and Y velocities are independent
of each other.

Q12. In class we saw two carts being pulled together by a single rope. One student had a
smaller mass than the other student. What can be said about this demo?
A. According to Newton

Explanation / Answer

11. C

12 D

13 Conserving momentum,

1000*50=(1000+500)v

v=33.33km/h B is correct.

14 C

15 A

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