Quiz 1 of 0

# SPH3U: Lesson 8 Quiz

Notice: Trying to get property ‘post_author’ of non-object in /home/forge/cilearning.ca/web/app/themes/buddyboss-theme/learndash/ld30/quiz.php on line 143

Answer all of the questions below. Where appropriate, be sure to draw a free body diagram of the forces acting on the object. Your diagram should be drawn to scale. Unless otherwise stated, assume that the only forces acting on the object are the ones mentioned in the problem.

1. A car engine provides a forward thrust of 4 000 N. There is 800 N off friction acting to slow the car down and 600 N of air resistance. What is the net force acting on the car?
2. An airplane is flying at a constant speed. The thrust from the propeller is 8 000 N [E]. A crosswind is applying a force of 2 000 N [N]. What is the net force acting on the airplane?
3. The cable that supports an elevator exerts a force of 14 000 N upwards on the elevator. Gravity pulls down on the elevator with a force of 12 000 N. What is the net force acting on the elevator?
4. Considering your answer to question 3, how would you describe the forces causing the motion of the elevator, using the terms friction, gravity, and normal force?

Remember that you can scan your answer sheets, and send them in jpg, pdf, or rft format, however the file must be less than 5 MB. Make sure your name is printed on every sheet.

### Rubric

Free Body Diagrams

Note: A student whose achievement is below Level 1 (50%) has not met the expectations for this assignment or activity.