How is a molecule different than an atom

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

Atypical jetliner lands at a speed of 146 mi/h and decelerates at the rate of (10.4 mi/h)/s. if the jetliner travels at a constant speed of 146 mi/h for 1.5 s after landing before applying the brakes, what is the total displacement of the jetliner between touchdown on the runway and coming to rest?