A3000 kg hino truck moving at a speed of 40 ms^-1 suddenly applies brakes and the vehicle slides 40m before it comes to rest. the coefficient of kinetic friction between the surface of the road and the wheels is uk=0.05.
a) calculate the kinetic friction of the force.
b)calculate the acceleration of the truck.
c) calculate the force applied by the brakes.

Asquare isothermal chip is of width w=5 mm on a side and is mounted in a substrate such that its side and back surfaces are well insulated; the front surface is exposed to the flow of a coolant at tinf=15 °c. from reliability considerations, the chip temperature must not exceed t=85 °c. if the coolant is air and the corresponding convection coefficient is h=200 w/m2 x k, what is the maximum allowable "power" of the chip? if the coolant is a liquid for which h=3000 w/m2 x k, what is the maximum allowable power of the chip?

Which object reflect light with the longest wavelength

Asatellite orbits earth in a circular orbit. does earth's gravity do work on the satellite? explain.