I have no idea on how to do kinematics and need help.?
Here is one of the questions.
A child riding a bicycle at 15 meters per second decelerates at the rate of 3 meters per second^2 for 4.0 seconds. What is the child’s speed at the end of the 4 seconds.
please help I am really confused on where to plug in the numbers and what equations to use when.
You are looking for the final velocity of the bicycle call it Vf
given info:
Vi = 15 m/s
a = -3 m/s^2
t = 4 s
Use this equation
Vf = Vi + at
Vf = 15m/s + (-3m/s^2)4s
Vf = 15m/s – 12m/s
Vf = 3m/s
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