1. A boat is pulled along a canal using a rope tied to its bow. The rope makes an angle of 15° with the centre line of the canal and the force applied to the rope is 1800N. Calculate the
force pulling the boat along the canal and the force pulling the boat to the side of the canal.

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =

friction

explanation:

they us to move forward and backwards

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