Wich single force acts on an object in free fall (air resistance) (gravity) (friction) (fluid forces)

An object is dropped from rest. What is the acceleration after 3 s? The acceleration of gravity is 9.8 m/s.

Two weight lifters (Herb and Foley) wonder which one is doing the most work. Which statement is true?

Consider the third period of the periodic table. Which element has the smallest atomic radius?

The distance at inferior conjunction (closest to Earth) is calculated by subtracting the planet's orbit size from Earth's distance from the sun (1 au). What is Venus's distance at inferior conjunction?

As Luke rides his bike down a hill, potential energy is converted to kinetic energy. What is this an example of? A. Law of universal gravitation B. Theory of relativity C. Theory of momentum D. Law of conservation of energy

The metallic elements which all react in water are found in the: same group same period rare earth elements

How much work is required to move a box 5 meters across the floor with a force of 15N?

Why have plants in the alpine biome adapted to survive on limited nutrients?

At a molecular level, does plasma have more or less energy than other states of matter?

A bobsledder pushes her sled across horizontal snow to get it going, then jumps in. After she jumps in, the sled gradually slows to a halt.