A cyclist is stopped at a traffic light. When the light turns green, the cyclist accelerates at 3.2 m/s. After 2.4 seconds, what is the cyclist’s speed?
velocity = acceleration * time
what calculator did you use for that?
To find the cyclist's speed after 2.4 seconds, we can use the equation:
v = u + at
where:
v = final velocity (speed)
u = initial velocity (speed)
a = acceleration
t = time
In this case, the cyclist starts from rest at the traffic light, so the initial velocity (u) is 0 m/s. The acceleration (a) is given as 3.2 m/s². The time (t) is 2.4 seconds.
Substituting these values into the equation, we get:
v = 0 + (3.2 * 2.4)
Now, let's calculate the cyclist's speed:
v = 0 + 7.68
v = 7.68 m/s
Therefore, after 2.4 seconds, the cyclist's speed is 7.68 m/s.