A car engine uses the combustion of fuel to move a system of gears that move its wheels. Not all of the fuel's energy is transferred to the wheels.
Which two options describe what happens to the rest of the energy?
A. Some energy is lost because it is transformed into thermal
energy
B. Some energy is lost because it is transformed into chemical
energy
I c. Some energy is lost because it is transformed into potential
energy
D. Some energy is lost because it is absorbed by the driver.
O E. Some energy is lost because of the friction between the gears.

Many machines- including inclined planes such as ramps- increase the strength of the force put into the machine but decrease the distance over which the force is applied.

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?