We will have a quiz on Monday, November 10th. The quiz will cover the concepts of speed, motion, and velocity.
Key formulas:
Speed=distance/time Velocity=speed + direction
Velocity vectors (arrows): same direction (add) opposite directions (subtract)
right triangle (use Pythagorean Theorem)
Example #1: A car travels north for 120 miles. The car travels for 3 hours. Find the speed of the car. Speed=distance/time
speed=120 miles/3 hours
speed=40 miles/hour
****A velocity problem would work the same but have a direction in the answer.**
Example #2: A train travels at 55 km/h for 4 hours. Find the distance the train travels.
Speed=distance/time
55 km/h= distance/4 hours
(55 km/h) (4 hours) = distance
220 km = distance
Example #3: Find the average speed of the car if it travels 200 miles in 3 hours on Day 1 and 200 miles in 5 hours on Day 2.
Average speed= total distance/total time
Average speed= 400 miles/8 hours
Average speed= 50 miles/hour
Students should have examples in their notebook. They should also study velocity vectors and their motion notes.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment