The magnitude of the kinetic frictional force between the surface and the 5kg block is 8n. the coefficient of kinetic friction between the 2kg block and the surface is 0,31 a. calculate the magnitude of the kinetic frictional force between 2kg block and the surface
b. calculate the magnitude of the tension in the string connecting the two blocks

The correct answer is c. hope this

What kind of enegia produces the mixture of bicarbonate and vinegar  chemical producetion

Distance covered, s = 8ft - 4ft = 4 ftinitial velocity, u = 34 ft/sthe acrobat is moving upwards and therefore, a = -g = -9.81 m/s^2 = 32.19 ft/s^2applying equation of motion; s = ut -1/2gt^2then,4 = 34t -1/2*32.19t^24 = 34t - 16.095t^2rearranging; -16.095t^2 + 34t - 4 = 0solving the quadratic equation; t = {-34 +/- sqrt [34^2 - 4(-16.)]}/2(-16.095) = 1.06 +/- 0.93 = 0.13 or 1.99the acrobat will take 0.13 seconds to be at 8 ft above the ground. additionally, once at the maximum height, the acrobat will move down and be at the same spot (that is height) after 1.99 seconds moving down.