Why do we use change of distance instead of just distance when calculating for speed and velocity?

All BUT one factor will increase the work output of a machine and decrease the amount of thermal energy created and released. That isA) develop new and more efficient fuels. B) add a lubricant, such as oil, to the machine.

A 2 kilogram bowling ball is 2.5 meters off the ground on a post when it falls just before it reaches the ground it is traveling 7 m/s assuming there is no air resistance which statement is true A the mechanical energy is not conserved B the initial

A race car has a mass of 710kg. It starts from rest and travels 40.0m is 3.0s. The car is uniformly accelerated during this time. What bet force is acting on the car?

If a spring stores 33.5 J of energy when it's compressed by 0.13 m, what is the spring constant of the spring?

Formed when constructive and destructive interference occur at the same time in a wave

Microwave ovens emit microwave energy with a wavelength of 12.3 cm. What is the energy of exactly one photon of this microwave radiation?

When light bounces off a surface, which component will be reflected more - the component that is parallel to the surface, or the component that is perpendicular to the surface, and why?

What is 18 degrees celsius in fahrenheit?

A small object moves along the x-axis with acceleration ax (t) = - (0.0320m/s3) (15.0s-t). At t = 0 the object is at x = - 14.0 m and has velocity v0x = 8.90 m/s. What is the x-coordinate of the object when t = 10.0 s?

Nitrogen and Hydrogen react to form ammonia (NH3). The reaction looks like this: Ammonia What is the ratio of nitrogen atoms to hydrogen atoms in ammonia? 1 to 2 1 to 3 2 to 1 3 to 1