Question

Please help. Not my strongest subject

Answer 1

A) You'll notice from "c)" that the distance the object travelled was 75m, so you get $V_a_v_e_r_a_g_e = 75m/15s = 5 m/s$.

b) $a = dV/dT$, so $a = (0-10)/15$ and then you get $a = -2/3 m/s ^{2}$.

c) $S = S_0 + V_0T + 0,5aT^2$ and you get $S = 10T - (2/6)T^2$ and you plug in $T = 15s$ and you'll get $S = 75m$