Im stuck on number 4, am i just supposed to talk about theory because there is no given info.

Explanation:

Assuming no air resistance, the horizontal acceleration at all points is 0, and the vertical acceleration at all points is -g (if near the surface of the Earth, -9.8 m/s²).

glen is correct.

step-by-step explanation:

glen is correct because when you multiply 4 * 2 = 8.

and 4 * 3 = 12.

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6