A massive truck rear ends a car as shown in fig. Which of the following quantities is not the same for the truck and the car above during the collision ? impact force
time of contact
magnitude of impulse
acceleration due to impact
all of the above.

The answer is periosteum

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.