Velocity
Calculus
Level
pending
A body is projected vertically upward s such that its height from the ground is h = 168t – 12t². What is the velocity when t = 4 seconds. “h” is the height in feet and “t” is the time in seconds
76 feet/sec
72 feet/sec
75 feet/sec
70 feet/sec
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1 solution
integrate h=168t-12t^2
dv/dt=168-12(2)t where t=4
168-24(4) =72 ft/s