An SUV pulls a trailer carrying a boat. The mass of the SUV is 2570 kg and the m

Question

An SUV pulls a trailer carrying a boat. The mass of the SUV is 2570 kg and the mass of the boat and trailer is 430 kg. The SUV starts from rest (velocity = 0) and accelerates for 10 seconds to final velocity 12 m/s; i.e., a = 1.2 m/s2 . During the acceleration, what is the force on the boat and trailer? (A positive force means a force in the direction of motion.) Tries 0/25 What is the force exerted by the trailer on the SUV? Tries 0/25 What is the net force on the SUV? Tries 0/25 What is the frictional force exerted by the road on the tires of the SUV? Tries 0/25

Explanation / Answer

a .
F = ( m + M ) a ;

F = ( 2570 + 430) * 1.2 = 3600

b .

the force is in the negstive direction ;

F = ma = 430 * 1.2 = -526 ;

c .

net force = Ma = 2570 * 1.2 = 3084 N ;

d .

it is because of frictino that the boat is moving

f - 526 = 3084 ;

f = 3610 ; <---ans

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