Your 1400-kg car pulls a 530-kg trailer away from a stoplight with an acceleration of 2.10 m/s2. Part A What is the force exerted by the car on the trailer? Assume no friction is acting on the trailer at this moment. Express your answer to three significant figures and include the appropriate units. Assume that the positive x axis is directed toward the direction of motion.

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.

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4. if you were an astronaut on the moon, what would you experience? what would you see from your perspective?