Atrain accelerates from its metropolitan cruising speed of 22 m/s to its countryside cruising speed of 32 m/s. if it takes the train 142 seconds to do this, what is its acceleration? 10 m/s2 14.2 m/s2 4.4 m/s2 0.07 m/s2

Abug is 12 cm from the center of a turntable that is rotating with a frequency of 45 rev/min . what minimum coefficient friction is required so that the bug stays on the turntable?

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.

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?