Motion Exam Review Problem #1 1. Using this distance - time graph, calculate the average SPEED.
Answer Problem #1 1. S =? D=60km T=4hr S = D/T S = 60 km / 4hr S = 15 km/hr
Motion Exam Review Problem #2 2. Part #1: Calculate the speeds of segments A, B, & C. Part #2: What is the total average speed of the trip?
Answer Problem #2 2. a) 12m / 6s = 2m/s b) 0 m / 8s = 0 m/s c) 4m / 4s = 1m/s Part #2: 16m / 18s = 0.89 m/s
Motion Exam Review Problem #3 3. If this is a graph showing a straight line for speed versus time, what does it say about acceleration?
Answer Problem #3 3. Since the speed is increasing at a constant rate (straight line), then you do have acceleration.
Motion Exam Review Problem #4 4. a) Which line segments show positive acceleration? b) Which line segments show negative acceleration?
Answer Problem #4 4. Lines A and B show positive acceleration. Line C shows that you are slowing down and thus acceleration would be a negative number.
Motion Exam Review Problem #5 5. A bullet train covers 354 kilometers in 2 hours. What is its average SPEED?
Answer Problem #5 S = ? D = 354 km T = 2 hr S = D / T S = 354 km / 2 hr S = 177 km/hr
Motion Exam Review Problem #6 6. Sara covers 46 meters on her skateboard in 4 minutes. What is her SPEED?
Answer Problem #6 S = ? D = 46m T = 4 min S = D / T S = 46m / 4min S = 11.5 m/min
Motion Exam Review Problem #7 At what SPEED is a plane traveling if it covers 1,786 kilometers in 1.5 hours?
Answer Problem #7 S = ? D = 1786 km T = 1.5hr S = D / T S = 1786 km / 1.5 hr S = 1190.67 km/hr
Exam Review Force An object with a balanced force has no motion A object with an unbalanced force results in a motion of that object
Calculate the Net Force
Calculate the net force and direction
Calculate Net force and direction Two horses are pulling on a person in opposite directions. The horse on the right pulls with a force of 75 N. The horse on the left pulls with a force of 92 N. What is the total net force and the direction of movement?