Suppose you needed to build a raft to cross a fast-moving river. Describe the physical and chemical properties of the raft that would be important to ensure your safety.

Match the following vocabulary 1. A force applied by a surface that is perpendicular to that surface friction force 2. A pulling force force 3. A rubbing force between the surfaces of two objects Newton's first law 4.

A baseball leaves a bat and flies upward and toward center field. Do not ignore air resistance. What forces are exerted on the ball just after it leaves the bat?

1. An object with a mass of m is thrown straight up near the surface of the earth. While the object is going up, the net force on it is A) Zero. B) Less than mg. C) Equal to mg. D) More than mg.

A round object of mass 10 kg and radius 0.5 m rolls without slipping down a hill from a height of 4.5 m. If its speed at the bottom is 6.5 m/s, what is the moment of inertia of the object about its center? a) 4.79 kg·m2 b) 3.63 kg·m2 c) 2.

The atoms in a solid move about freely

According to the Theory of Continental Drift, what did the Earth's continents look like 255 million years ago?

What is the emf of a battery that increases the electric potential energy of 0.060 CC of charge by 0.70 JJ as it moves it from the negative to the positive terminal?

Why is gravitational potential energy negative?

What will happen to this current if a magnet is brought near the cord?

The kinetic energy of a sliding block came from the: kinetic energy of the string. kinetic energy of the board. gravitational potential energy of the block. gravitational potential energy of the mass on the hook.