A crate is being pushed at a constant speed across the floor. The gravitational force on the crate is 80N, and the applied force is 50N. What are the other force(s) acting on the crate?

Friction force.

Explanation:

Force is defined as a pull or push acting on an object that changes the speed or direction of the motion.

When a crate is is being pushed at a constant speed across the floor along with gravitational force and the applied force, there will be a force of friction applied by the floor on the opposite direction of applied force.

Friction always opposes the applied force and resist the changes in the motion of the object.

Hence, the correct option is Friction force.

energy can be converted from one form to another, but it cannot be created or destroyed in ordinary chemical or physical means. do not understand what you are asking but hope this

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.