A child operating a radio-controlled model car on a dock accidentally steers it off the edge. The car's displacement 0.76sec after leaving the dock has a magnitude of 7.0m. What is the car's speed at the instant it drives off the edge of the dock?
P.S I have tried this questions several times... it is not the answer to find vox by doing this: X= (vox)T
vox= 7.0m/0.76sec
vox= 9.2m/s
I also tried this...
y=voyt + 0.5ayt^2
y=(om/s)(0.76sec) + (0.5)(-9.8m/s^2)(0.76sec^2)
y= -2.0830m
vy= Square root (om/s)^2 + 2(-9.8m/s^2)(0m-2.830m)
vy= -7.4m/s
I don't know what I am doing wrong? Any suggestions would be appreciated.
P.S I have tried this questions several times... it is not the answer to find vox by doing this: X= (vox)T
vox= 7.0m/0.76sec
vox= 9.2m/s
I also tried this...
y=voyt + 0.5ayt^2
y=(om/s)(0.76sec) + (0.5)(-9.8m/s^2)(0.76sec^2)
y= -2.0830m
vy= Square root (om/s)^2 + 2(-9.8m/s^2)(0m-2.830m)
vy= -7.4m/s
I don't know what I am doing wrong? Any suggestions would be appreciated.