A cyclist is coasting at 14 m/s when she starts down a 440 m long slope that is 30 m high. The cyclist and her bicycle have a combined mass of 70 kg. A steady 13 N drag force due to air resistance acts on her as she coasts all the way to the bottom. Required:
What is her speed at the bottom of the slope?

Ablock of mass m = 2.5 kg is attached to a spring with spring constant k = 790 n/m. it is initially at rest on an inclined plane that is at an angle of 28 degrees with respect to the horizontal, and the coefficient of kinetic friction between the block and the plane is k = 0.14. in the initial position, where the spring is compressed by a distance of a = 0.18 m, the mass is at its lowest position and the spring is compressed the maximum amount. take the initial gravitational energy of the block as zero. b) if the spring pushes the block up the incline, what distance, l, in meters will the block travel before coming to rest? the spring remains attached to both the block and the fixed wall throughout its motion.

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories