If the contraction of the left ventricle lasts 250 ms and...

If the contraction of the left ventricle lasts 250 ms and the speed of blood flow in the aorta (the large artery leaving the heart) is 0.80 m/s at the end of the contraction, what is the average acceleration of a red blood cell as it leaves the heart? (a) 310 ms$^2$; (b) 31 m/s$^2$; (c) 3.2 m/s$^2$; (d) 0.32 m/s$^2$.

Labs

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

Key Concepts

Average Acceleration

Average acceleration is defined as the change in velocity divided by the time taken for that change. It is a fundamental concept in kinematics and helps describe how quickly an object speeds up or slows down over a given period, using the formula a = ?v / ?t.

Time Interval

The time interval is the duration over which the change in velocity occurs. In calculations involving acceleration, accurate determination and conversion of time (for example, converting milliseconds to seconds) is essential to ensure correct computations in standard units.

Velocity

Velocity is the measure of the speed and direction of an object's motion. In acceleration problems, the change in velocity between the beginning and end of the time interval is used to calculate the average acceleration, making it a key component in such analyses.

Kinematics Equations

Kinematics is the branch of physics that deals with the motion of objects without considering the forces that cause the motion. It involves using equations that relate displacement, velocity, time, and acceleration, which are crucial in solving problems related to the motion of objects, such as calculating average acceleration.

Transcript

Please give Ace some feedback