Answer:
SANA MAKATULONG
Explanation:
This is an SAT Subject Test – Physics question.
Strikes ground at 45°: Horizontal and vertical components equal at this moment.
Thrown horizontally: Vertical component of velocity present only due to acceleration due to gravity.
20-m high hill: (v_vertical)^2 - 0^2 = 2 * 10 * 20 (v^2 - u^2 = 2 a s) so v_vertical = 20 m/s.
(Gravity acts only in vertical direction): v_horizontal is always the same, and is equal to v_vertical (from point 1).
Answer: v_horizontal = 20 m/s.
