Keiko is riding a skateboard 2 m/s, west. How long will it take her to reach a velocity of 8 m/s, west if her acceleration is 2 m/s2?
3 seconds
6 seconds
8 seconds
10 seconds
Plz, try to respond as fast as you can!
a = v2-v1/t
2 = 8-2/t
isolate for t
To find out how long it will take for Keiko to reach a velocity of 8 m/s, we can use the equation of motion:
v = u + at
Where:
v = final velocity (8 m/s, west)
u = initial velocity (2 m/s, west)
a = acceleration (2 m/s^2)
t = time taken
Substituting the known values into the equation:
8 = 2 + 2t
Rearranging the equation to solve for t:
2t = 8 - 2
2t = 6
t = 6/2
t = 3
Therefore, it will take Keiko 3 seconds to reach a velocity of 8 m/s, west.