What does the physics equation EF=0 mean?

A roller coaster, traveling with an initial speed of 15 meters per second, decelerates uniformly at â7.0 meters per second2 to a full stop. approximately how far does the roller coaster travel during its deceleration?

A soda has a volume of 560 mL and a density of 3.2 g/mL. What is the mass?

A bike rider rides at an average of 12 m/s for 30 minutes. How many km can the rider travel in that time? Show your work. (What it means by that time? I meant the 30 min just to let you guys know^^)

If the potential difference across the bulb in a certain flashlight is 3.0 V, What is the potential difference across the combination of batteries used to power it?

A swimmer swims 40 miles in 80 seconds. What is the swimmer's average speed?

Determine the magnitude of the effective value of g⃗ at a latitude of 60 ∘ on the earth. assume the earth is a rotating sphere.

What characteristic of a planet determines the acceleration due to gravity on it?

Which set of terms best defines what affects kinetic energy and potential energy, respectively? position, gravity gravity, position velocity, height height, velocity

You are operating a powerboat at night. You see green and white lights on another boat. What should you do?

How does Newton's second law apply to an "Egg Drop" experiment?