Question

essay 2 points. a truck and a sports car are traveling down a mountain road. both the truck and car apply the same force on the brakes of their vehicles at the same time. when each driver presses the brake pedal, a fluid system uses brake fluid and a brake pad to multiply the drivers force, causing the brake system to decrease the vehicles velocity. the velocities of both vehicles are shown in the table. the velocities of both vehicles are shown in the table. student a is correct because the velocity of the skydiver from 7 to 9 seconds becomes steady at -50 m/s. the constant velocity indicates that the net force acting on the skydiver is 0 because 0 net force indicates that there is no acceleration and therefore no change in velocity. this shows that the drag force and the weight must be balanced and equal. student b is correct because at the 9 - 10 second mark the skydiver begins to slow down. this indicates that the net force must be against the motion of the skydiver because he is experiencing acceleration that is slowing him down. there is not enough information to tell. neither student is correct. if the drag force were ever equal to the skydivers weight then the skydiver would be stuck in the air because the net force would become 0 meaning that he would be stationary and would never reach the ground.

Explanation:

Explicación:

Paso 1: Comprender la ley de Newton para fuerzas netas

Según la segunda ley de Newton, $F_{net}=ma$. Cuando $F_{net} = 0$, $a = 0$ y la velocidad es constante.

Paso 2: Analizar la velocidad del saltador de paracaídas

De 7 a 9 segundos, la velocidad es constante (- 50 m/s), lo que significa que $F_{net}=0$. Esto implica que la fuerza de arrastre y el peso están equilibrados.

Paso 3: Analizar la situación de 9 - 10 segundos

De 9 - 10 segundos, el saltador de paracaídas se ralentiza, lo que significa que hay una fuerza neta en dirección opuesta a su movimiento, causando una aceleración negativa.

Respuesta:

Student A is correct because the velocity of the skydiver from 7 to 9 seconds becomes steady at -50 m/s. The constant velocity indicates that the net force acting on the skydiver is 0 because 0 net force indicates that there is no acceleration and therefore no change in velocity. This shows that the drag force and the weight must be balanced and equal.

Answer:

Explicación:

Paso 1: Comprender la ley de Newton para fuerzas netas

Según la segunda ley de Newton, $F_{net}=ma$. Cuando $F_{net} = 0$, $a = 0$ y la velocidad es constante.

Paso 2: Analizar la velocidad del saltador de paracaídas

De 7 a 9 segundos, la velocidad es constante (- 50 m/s), lo que significa que $F_{net}=0$. Esto implica que la fuerza de arrastre y el peso están equilibrados.

Paso 3: Analizar la situación de 9 - 10 segundos

De 9 - 10 segundos, el saltador de paracaídas se ralentiza, lo que significa que hay una fuerza neta en dirección opuesta a su movimiento, causando una aceleración negativa.

Respuesta:

Student A is correct because the velocity of the skydiver from 7 to 9 seconds becomes steady at -50 m/s. The constant velocity indicates that the net force acting on the skydiver is 0 because 0 net force indicates that there is no acceleration and therefore no change in velocity. This shows that the drag force and the weight must be balanced and equal.