Question

1. mrs. mcintosh has a minivan that she uses to drop her kids off from school that has a mass of 1400 kg. mr. mcintosh drives a truck with a mass of 2300 kg. if the two vehicles are travelling down the road, side by side, at a speed of 75 km/hr, which one will have the most momentum? (hint: you must solve for both of them to compare).

p = m x v
p = m x v
the truck has more momentum ( ) than the ( ).
extra credit:
if a dog has a momentum of 24 kgm/s as it chases a rabbit, and a mass of 12 kg, what is its velocity (in m/s)? (you dont multiply this time.. what do you think you need to do???

Explanation:

Step1: Convert la velocidad de 75 km/h a m/s

1 km = 1000 m, 1 h = 3600 s. Entonces, \(v = 75\times\frac{1000}{3600}\approx20.83\ m/s\)

Step2: Calcular el momento del minivan

Dado \(m = 1400\ kg\), \(v\approx20.83\ m/s\). Usando la fórmula \(P = m\times v\), \(P_{minivan}=1400\times20.83 = 29162\ kg\cdot m/s\)

Step3: Calcular el momento del camión

Dado \(m = 2300\ kg\), \(v\approx20.83\ m/s\). Usando la fórmula \(P = m\times v\), \(P_{camion}=2300\times20.83=47909\ kg\cdot m/s\)

Answer:

El camión tiene más momento.