(b.) student : (1) My Day 9. An airplane starts from rest and accelerates at a constant rate of \( 3.00 \mathrm{~m} / \mathrm{s}^{2} \) for 30.0 s before leaving the ground. a. How far did it move? b. How fast was it going when it took off? 10. A brick is dropped from a high scaffold. a. What is its velocity after 4.0 s ? b. How far does the brick fall during this time? 11. A tennis ball is thrown straight up with an initial speed of \( 22.5 \mathrm{~m} / \mathrm{s} \). It is caught at the same distance above the ground. a. How high does the ball rise? b. How long does the ball remain in the air?

QUESTION 5 A bus accelerates from rest to 0,067 \( 0.04 \mathrm{~km} / \mathrm{h} \) in 17 seconds; it continues with this speed for rest. Plot a velocity time graph for the journey then calculate. 5.1 The total distance covered. 5.2 The average speed for the whole journey

40 If a toy helicopter is moving at \( 12 \mathrm{~m} / \mathrm{s} \), how much energy does the 3 kg toy have? Show your work!

2. Cuatro personas de 80 kgf de peso, suben a un cerro de 200 metros en un automóvil de 1.200 kg . Calcular el trabajo hecho por el motor y el recibido por cada persona.

4. For vectors \( \vec{A}=120 \hat{i}-60 \hat{j}, \vec{B}=-3 \hat{i}+4 \hat{j} \) and \( C=10 j \) (answer only inside the given boxes. \begin{tabular}{ll|l}\hline i) Find unit vgctor along & \( \vec{B} \quad \) [3pts] & ii) Find unit vector along \( E=\vec{A}+\vec{C}[4 p t s] \)\end{tabular}

3. Una estudiante de física que estudia el movimiento parabólico, lanza un cuerpo con cierta velocidad y ángulo. Con el objetivo de medir la altura del cuerpo, la estudiante decide medir el tiempo cada dos segundos, durante los primeros 10 segundos, obteniendo la siguiente expresión. \[ h(t)=50 t-5 t^{2} \] A. Determine la variable dependiente e independiente del experimento. B. Construya la tabla de datos para el experimento. C. Realice una gráfica para los datos del experimento.