Awoman pushes a 27 kg lawnmower at a steady speed. she exerts a 180 n force in adirection 31 degrees below the horizontal. the acceleration of gravity is 9.8 m/^2find the magnitude of the vertical force this lawnmower exerts on the lawn. answer in units of n.

The solution for this problem is computed by:

 

We must look for the weight of the lawnmower = mg = 27 x 9.8 = 264.6 N 

Then look for the component of exerted force in downwards direction = 180 sin (31) = 92.71 N 

Total downwards force = 264.6 + 92.71 = 357.31 N 

Answer the above statement is ( false );

How is it possible that phylogenies based on sequences from nuclear genomes and organellar genomes (i.e., chloroplasts and mitochondria) from the same group of species yield phylogenetic trees with different branching orders?   answer :   the genome of the endosymbiont is more closely related to members of the group in which it originally evolved, while the nuclear genome of the engulfing organism has its own evolutionary trajectory.