Question
A toy race car zooms across the ground with an acceleration of 2.8 m/s^2. After 4 seconds it has a final velocity of 22.2 m/s, what is the toy car's initial velocity? (NOTE: Only 1 point if no work is shown)
Answers
Answered by
GPT 3.5
To solve this problem, we can use the formula for velocity:
v = u + at
Where:
v = final velocity (22.2 m/s)
u = initial velocity (unknown)
a = acceleration (2.8 m/s^2)
t = time (4 seconds)
Rearranging the formula to solve for u, we have:
u = v - at
Substituting the given values, we have:
u = 22.2 m/s - (2.8 m/s^2)(4 s)
u = 22.2 m/s - 11.2 m/s
u = 11 m/s
Therefore, the toy car's initial velocity is 11 m/s.
v = u + at
Where:
v = final velocity (22.2 m/s)
u = initial velocity (unknown)
a = acceleration (2.8 m/s^2)
t = time (4 seconds)
Rearranging the formula to solve for u, we have:
u = v - at
Substituting the given values, we have:
u = 22.2 m/s - (2.8 m/s^2)(4 s)
u = 22.2 m/s - 11.2 m/s
u = 11 m/s
Therefore, the toy car's initial velocity is 11 m/s.