1. Acceleration

2. a – acceleration (m/s 2, km/h 2 ) v 2 – final velocity (m/s, km/h) v 1 – initial velocity (m/s, km/h) t – time (s,h)

3. Terms that replace numbers in questions: Starts from restv 1 = 0 Comes to a stopv 2 = 0 Falling towards the grounda = 9.81 m/s 2 Constant speeda = 0 ***if the acceleration and the velocity have different signs (+ or -) or direction (N or S), this indicates that the object is slowing down or decelerating Demonstration Units Acceleration is measured in m/s 2 or km/h 2.

4. 1.A student is travelling at 16.0 m/s [N] and 3.0 seconds later is travelling at 4.0 m/s [N]. Find the acceleration of the student.  the student is decelerating at 4.0 m/s 2 [S]

5. 2.A student is driving at 60.0 km/h. She accelerates at 2.0 km/h 2 for 45.0 minutes. What is her final speed? v 1 = 60.0 km/h a = 2.0 km/h 2 t = 45 min. = 45/60 = 0.75 h v 2 = ?  the final speed of the student is 62 km/h. 1.4 Prac. #5-8