Question

a football player with a mass of 85 kg wears a uniform and helmet with a combined mass of 4.5 kg. the football player moves at a velocity of 2.1 m/s. calculate the total momentum of the football player and their uniform, rounding the final answer to two significant figures. kg·m/s 180 188 179 190

Explanation:

Step1: Calcular la masa total

Sumamos la masa del jugador y la del uniforme y el casco. $m = 85\ kg+ 4.5\ kg=89.5\ kg$

Step2: Calcular el momento

Usamos la fórmula $p = m\times v$, donde $v = 2.1\ m/s$. Entonces $p=89.5\ kg\times2.1\ m/s = 187.95\ kg\cdot m/s$

Step3: Redondear

Redondeamos a dos cifras significativas. $p\approx190\ kg\cdot m/s$

Answer:

190