The initial speed of a body is 7.2 m/s.
What is its speed after 3.52 s if it accelerates
uniformly at 1.62 m/s2? Answer in units of m/s.
What is its speed after 3.52 s if it accelerates uniformly at −1.62 m/s2?
v = v0 + at
a=1.62 m/s^2 means v increases by 1.62 m/s every second, so
v = 7.2 + 1.62 * 3.52 = ____
for part (ii), since a is now negative, subtract instead of adding.