2. A sled dog pulls a 20.0 kg sled. He exerts a force of 80,0 N at an angle of 30° above horizontal, for a distance of 5.0 m. The force of friction is 60,0 N. Calculate the work
done by FAS, FN, Fy and the net work done by the net force,

When considering gravity acceleration and the force of acceleration, what must be true? a. the direction of acceleration must be perpendicular to the direction of the force. b. the direction of the force and the direction of acceleration must be the same as each other. c. the direction of the force and the direction of acceleration must be opposite of each other. d. the mass of the body must be the same as the acceleration of the body.

(a) calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 10.0 g. silver has 47 electrons per atom, and its molar mass is 107.87 g/mol. (b) imagine adding electrons to the pin until the negative charge has the very large value 1.00 mc. how many electrons are added for every 109 electrons already present

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.