According to the position vs time graph below, at what time did David first start to move in a positive velocity (forward direction)?
a
At 7 minutes
b
At 0 minutes
c
At 3 minutes
d
At 5 minutes
1 answer
b
a
At 7 minutes
b
At 0 minutes
c
At 3 minutes
d
At 5 minutes
1 answer