A 900 kg car accelerates 2 m/s2 to the right. What is the net force acting on the car?

1800 N to the left
450 N to the right
450 N to the left
1800 N to the right

The boat's velocity relative to the riverbank can be resolved into two components. the component going north is 2.7 m/s and the component going west is 1.2 m/s.we add these two vectors and then find the magnitude of the resultant to get the speed.the magnitude of the resultant vector from adding can be obtained by the pythagorean theorem.    to two significant figures, the boat's speed relative to the riverbank is 3.0 m/s.

Iwould say the answer is d