EXERCISE A particle with velocity Ü. = -2î +4h in meters per second at t = 0 undergoes a constant acceleration à of magnitude a = 3ms-2 at an angle 0 = 130° from the a o positive direction of the x axis. What is the particle's velocity Ŭ at t = 5s, in unit vector notation and as a magnitude and an angle?

Afeather of mass 0.001 kg falls from a height of 2 m. under realistic conditions, it experiences air resistance. based on what you know about friction, what can you say about the kinetic energy of the feather as it reaches the ground? acceleration due to gravity is g = 9.8 m/s2. a. ke < 0.0196 j b. ke = 00196 j c. je = 0 j d. ke > 0.0196 j

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?

Currents in dc transmission lines can be 100 a or higher. some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers. for a line that has current 150 a and a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? express your answer in teslas and as a percentage of the earth’s magnetic field, which is 0.50 g. is this value cause for worry?