Two carts, joined together with a spring-loaded mechanism between them, move along on an air track at constant speed. The carts have different inertia, and the heavier cart is in front of the lighter cart. Then the mechanism is released, after which the speeds of the carts relative to each other is four times their original speed relative to the ground. In what direction is the lighter cart moving after the mechanism is released?

An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

Astate of matter all that has define volume and can flow is a(n)

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.