Homework

Engineering 111 - Homework 12F

Instructions: Complete this form and click submit. The answers will be posted on the course home page after the due date and before the next exam. If you want to change any of your answers after you click submit, then go back and give your answers again and click submit.

Your Name: e.g. John Doe

Your Campus ID: e.g. 12345678

Your SFA Email Address: e.g. doejd@titan.sfasu.edu

Due Date

Use g = 9.81m/s² for the problems below. These are modifications of problems 10.3, 10.4, 10.5, and 10.6 from your book.

1. A girl shoots an arrow upward. It strikes the ground 20.0 seconds later. What was its initial velocity? Give your answer using three significant figures and include units with no spaces (e.g. 1.23m/s).

2. A girl shoots an arrow upward. It strikes the ground 20.0 seconds later. What was its maximum? Give your answer using three significant figures and include units with no spaces (e.g. 1.23m).

3. A bullet is fired vertically into the air and reached a maximum height of 1500m. What was the initial velocity? Give your answer using three significant figures and include units with no spaces (e.g. 1.23m/s).

4. A man standing on a 200-m tower throws a ball upward at 40 m/s. How long does it take to hit the ground? Give your answer using three significant figures and include units with no spaces (e.g. 1.23s).

5. The projectile of a trebuchet is fired at an angle of 65° relative to the ground. It is fired with a velocity of 100m/s. Find the initial x-component of the velocity (v_xo). Give your answer using three significant figures and include units with no spaces (e.g. 1.23m/s).

6. The projectile of a trebuchet is fired at an angle of 65° relative to the ground. It is fired with a velocity of 100m/s. Find the initial y-component of the velocity (v_yo). Give your answer using three significant figures and include units with no spaces (e.g. 1.23m/s).

Your Name:	e.g. John Doe
Your Campus ID:	e.g. 12345678
Your SFA Email Address:	e.g. doejd@titan.sfasu.edu
Due Date

	1. A girl shoots an arrow upward. It strikes the ground 20.0 seconds later. What was its initial velocity? Give your answer using three significant figures and include units with no spaces (e.g. 1.23m/s).
	2. A girl shoots an arrow upward. It strikes the ground 20.0 seconds later. What was its maximum? Give your answer using three significant figures and include units with no spaces (e.g. 1.23m).
	3. A bullet is fired vertically into the air and reached a maximum height of 1500m. What was the initial velocity? Give your answer using three significant figures and include units with no spaces (e.g. 1.23m/s).
	4. A man standing on a 200-m tower throws a ball upward at 40 m/s. How long does it take to hit the ground? Give your answer using three significant figures and include units with no spaces (e.g. 1.23s).
	5. The projectile of a trebuchet is fired at an angle of 65° relative to the ground. It is fired with a velocity of 100m/s. Find the initial x-component of the velocity (v_xo). Give your answer using three significant figures and include units with no spaces (e.g. 1.23m/s).
	6. The projectile of a trebuchet is fired at an angle of 65° relative to the ground. It is fired with a velocity of 100m/s. Find the initial y-component of the velocity (v_yo). Give your answer using three significant figures and include units with no spaces (e.g. 1.23m/s).