How does friction affect a machine efficiency?

How does mass affect the final velocity an object attains as it falls?

Is the velocity used to calculate reynolds number, average velocity?

An alternating current consists of charges that?

Discuss a physical activity that benefits muscular strength and describe at least two other benefits of performing this activity.

When an object moves in uniform circular motion, the direction of its acceleration is A) in the same direction as its velocity vector. B) in the opposite direction of its velocity vector C) is directed toward the center of its circular path.

Darna rolls the 7.05-kg ball down the lane and it hits the 1.52-kg pin head on. The ball was moving at 8.24 m/s before the collision. The pin went flying forward at 13.2 m/s. Determine the post-collision speed of the ball.

What is the acceleration caused by your push on the ball

In the chemical reaction in which carbon, hydrogen and oxygen absorb heat and combine to form carbon dioxide and water which of the following is considered to be a reactant? A. heat B. water C. oxygen D. carbon dioxide

A box is at rest on a table. What can you say about the forces acting on the box? The upward ___ and the downward___ are balanced Applied force Frictional force Normal force Drag force Gravitational force Tension

When the sun warms the sidewalk on a hot sunny day, what type of energy conversion occurs?