If two simple machines are compounds, the velocity ratio of the system is equal to​

Explain vector addition, triangle method and parallelogram method

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

Convection occurs when thermal energy is transferred by the movement of