Do these examples represent unbalanced or balanced forces?

A roller coaster's velocity at the top of a hill is 10m/s. two seconds later it reaches the bottom of the hill with a velocity of 26 m/s. what was the acceleration of the coaster?

Explain why a piece of paper falls slowly to the ground despite the force of gravity on it.

What effect does an increase in temperature have on viscosity?

A 1850 kg car moves with a velocity of 3 m/s. What is its kinetic energy? Joules

A submarine has a "crush depth" (that is, the depth at which water pressure will crush the submarine) of 250 m. What is the approximate pressure (water plus atmospheric) at this depth? (Recall that the density of seawater is 1025 kg/m3 g = 9.

An electric force exists between which pair of objects? Check all that apply. A) a neutral object and a negative object two negative objects B) a neutral object and a positive object C) two positive objects D) a negative object and a positive object

The Hubble Space Telescope (HST) orbits 569,000m above Earth's surface. Given that Earth's mass is 5.97 * 10^24 kg and its radius is 6.38 * 10^6 m, what is HST's tangential speed?

What do safety features in a car do to protect us in a collision

Chemical sediments that result from the evaporation of water are

A college student is working on her physics homework in her dorm room. her room contains a total of 6.0*1026 gas molecules. as she works, her body is converting chemical energy into thermal energy at a rate of 125 w.