Sled Zepplin is touring in West Virginia during the winter. During their final performance, they honor their founders by pulling the lead singer through the snow on a sled. They pull the sled with a force of 1800N at an angle of 40 degrees above the horizontal (North of East). The lead singer and the sled have a combined mass of 115kg. If the coefficient of kinetic friction between the sled and the snow is 0.15, calculate the acceleration of the sled.

During physical science, ms. greene challenged her students to produce an energy transformation. james and jill wrapped a 4-inch nail with a coil of fifty turns of wire. they connected one end of the coil to one terminal of a knife switch. they connected the other terminal of the knife switch to the battery. finally, they connected the end of the coil to the other terminal of the battery. james held the tip of a 1-inch nail near the flat end of the 4-inch nail. jill closed the knife switch quickly and then opened it. the 1-inch nail was pulled toward the 4-inch nail. what is the best explanation of why the nail moved? a) electrical energy was converted to mechanical energy in the 1-inch nail. b) the 4-inch nail became an electromagnet and the magnetic force attracted the 1-inch nail. c) the electric current in the 4-inch nail was converted to mechanical energy in the 1-inch nail. d) the 4-inch nail had a positive charge and the 1-inch nail had a negative charge. opposites attracted.

Asuppose a suitcase has a mass of (m) 30 kg and a net force (n) of 10 kg*m/s. what is the acceleration rate of the suitcasein m/s? show your work to support your answer.

Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z