Dynamometer

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/dynamometer

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the core measurement principle?Simultaneous measurement of torque and rotational speed (RPM)
2. What is the power calculation?Instantaneous power derived from torque and angular velocity
3. How does a dynamometer work?It puts a controlled resistance on the part that is turning, like a brake or a motor that pulls back. By measuring the force the part pushes against this resistance and how fast it spins, the dynamometer calculates the power.
4. Why do cars use dynamometers?Car makers use dynamometers to test engines and whole cars while they stay in a lab. The machines let them see how the car would feel on the road and help improve fuel use, speed, and emissions.

Prime Mover: An engine or motor that generates the initial mechanical power for a system.
Torque: The measure of the twisting or turning force applied to an object.
Rotational Speed (RPM): The rate at which an object rotates, measured in revolutions per minute.
Brake Horsepower (bhp): A measure of an engine's power after accounting for frictional losses within the engine itself.