Answer:
final speed is (3.5 + 1.5) = 5 m/s
Step-by-step explanation:
If it accelerates for 3 seconds with 0.5m/s² What will be the new speed?
An acceptation of 0.5 m/s² means that every second the speed increases by 0.5 m/s. After 3 * seconds you gain in speed by 3 * 0.5 = 1.5 m/s So the final speed is 3.5 + 1.5 = 5 m/ s
Here is another method:
u =3.5m/s
Make use of
a = (v-u) / t
where:
a is acceleration in m/s² =0.5
v is final velocity in m/s = ?
u is initial velocity in m/s = 3.5
t is time in s = 3
Rewrite so it starts with v =....
a = (v)/t - (u) / t
v/t = u/t + a
multiply left and right of the = sign by t
v = u + a * t
Substitutie the known numbers
v = 3.5 + 0.5 * 3
final speed is (3.5 + 1.5) = 5 m/s