help restore physical force.
举一反三
- When a force is applied to the spinning gyro, the rotor moves in a same direction of the applied force.
- 14. The magnetic compass magnets are acted on by the horizontal component of the Earth's total magnetic force. This magnetic force is GREATEST at the ______.
- Force majeure clause can help the seller to a great extent.。（ ）
- Physical activity does the body good, but it doesn't help the brain.
- 中国大学MOOC: A particle of mass m is exerted with a force. Which of the following forces is not a conservative force?(g, k, C, D and γ are constants, and υ is the speed of particle.)