Consider an object of mass 2kg at rest on a ramp with =0.5 and =0.4. If the ramp angle is 60 degrees, how far can the object travel in the first 4 seconds?

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?