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Is feet per second the same thing as velocity?
Feet per second is a unit of velocity, but not necessarily the same thing. Velocity could be in meters per hour or feet per second could be a measure of speed, which does not take direction into account, as velocity does.
What is the velocity of a helicopter traveling 6 feet per second?
Its speed is 6 feet per second. Its velocity is 6 feet per second in whatever direction it's going.
What is the velocity of a ball thrown at 16 feet per second?
16 feet/second is the speed. To know the velocity, you would also need to specify the direction in which the object moves.
One object has a velocity of -4 feet per second another has 3 feet per second which is greater?
The object with the velocity of -4 feet per second is going faster than the other, but in the opposite direction, hence the minus sign.
What is the skydiver's upward velocity after 1 second?
I presume you mean 1 second after jumping from the plane. Since skydiver's fall, their velocity is generally in a downward direction, so the upward velocity is negative. The formula v = gt, where g is the acceleration due to gravity which is about 32.2 feet per second per second, tells us that after 1 second it would be about -32.2 feet per second.
