Under the action of the engine a car with a mass of 2 tons, increases its speed for 10 seconds from 18 km / h. up to 72 km / h. Find the F of the car ?

see the picture for the vector

the magnitude of the vector by pythagorean theorem

r = √( (-10)^2 + (3)^2 ) = √109

magnitude = √109 units

the direction angle between vector and x-axis is

tan^(-1)(3/10) = 16.699

so the direction is approximately 16.7 degrees north of west

i think the answer is a and b

i wish you luck

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.