The speed of a bobsled is increasing because it has an acceleration of 2.0 m/s2. at a given instant in time, the forces resisting the motion, including kinetic friction and air resistance, total 450 n. the mass of the bobsled and its riders is 255 kg. (a) what is the magnitude of the force propelling the bobsled forward

F = 960 N

Explanation:

given,                      

acceleration = 2 m/s²

Force = 450 N                        

mass = 255 Kg                  

to calculate the force propelling the bobsled forward

∑ F  = ma                                            

F - f = ma                                        

F = m a + f                                  

F = 255 × 2 + 450                          

F = 510 + 450                                

F = 960 N                                    

the magnitude of the force propelling the bobsled forward is F = 960 N

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .

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