Asked by Bella

7. The rate at which velocity changes is?

A. Acceleration
B. Direction
C. Speeds
D. Velocity

8. Which is the example of velocity?

A. A pickup driving 30 km in 20 minutes
B. A car slowing down on a sharp curve
C. An airplane traveling 450 km/h
D. An 18 wheeler driving west at 50 km/h

9. Which is an example of acceleration?

A. A pickup driving 30 km in 20 minutes
B. A car slowing down on a sharp curve
C. An airplane traveling 450 km/h
D. An 18 wheeler driving west at 50 km/h
Answered by John
What do you believe are the correct answers??
Answered by Bella
I honestly don’t know
Answered by John
Do you recall your teacher saying something along the lines...
"The velocity of an object is the rate of change of its position with respect to a frame of reference, and is a function of time. Velocity is equivalent to a specification of its speed and direction of motion."
Most specifically velocity has a speed and direction... THat will help you answer #8 to begin with.
Answered by Damon
Velocity and acceleration are vectors.
A vector has BOTH speed and direction.
You can tell the speed of your car with a speedometer. HOWEVER for velocity you need BOTH a speedometer and a COMPASS. (remember that. It is a good way to remember what a vector is)

The acceleration vector is the rate of change of the velocity vector.
If velocity changes, plus or minus or in speed or in direction, you have acceleration
Answered by Damon
typo: A vector has both MAGNITUDE and direction.
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