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
What do you believe are the correct answers??
I honestly don’t know
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.
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
typo: A vector has both MAGNITUDE and direction.
7. The rate at which velocity changes is called acceleration. To understand this concept, you need to know that velocity is a vector quantity that includes both speed and direction. Acceleration is the rate at which an object's velocity changes over time. You can calculate acceleration by determining the change in velocity and dividing it by the change in time.
Answer: A. Acceleration
8. To determine which of the given options is an example of velocity, you need to remember that velocity is the rate at which an object's position changes in a specific direction. It takes into account both speed and direction.
Out of the options provided:
A. A pickup driving 30 km in 20 minutes: This option provides both speed (30 km) and time (20 minutes), but it does not mention the direction of movement. So it does not represent velocity.
B. A car slowing down on a sharp curve: This option does not provide any information about speed, just the change in direction. So it does not represent velocity.
C. An airplane traveling 450 km/h: This option provides both a specific speed (450 km/h) and does not mention the direction. So it represents velocity.
D. An 18 wheeler driving west at 50 km/h: This option provides both a specific speed (50 km/h) and mentions the direction (west). So it represents velocity.
Answer: C. An airplane traveling 450 km/h
9. To determine which of the given options is an example of acceleration, you need to recall that acceleration is the rate at which an object's velocity changes. It can be in the form of increasing speed, decreasing speed, or changing direction.
Out of the options provided:
A. A pickup driving 30 km in 20 minutes: This option provides information about the change in position but does not mention anything about velocity changes or time intervals. So it does not represent acceleration.
B. A car slowing down on a sharp curve: This option mentions the car slowing down, indicating a change in velocity. So it represents acceleration.
C. An airplane traveling 450 km/h: This option provides only information about the constant velocity of the airplane, so it does not represent acceleration.
D. An 18 wheeler driving west at 50 km/h: This option mentions the direction of movement but does not provide any information about velocity changes or time intervals. So it does not represent acceleration.
Answer: B. A car slowing down on a sharp curve