Presentation on theme: "Motion review by Jon Brumley"— Presentation transcript:
1Motion review by Jon Brumley PHYSICSMotion reviewby Jon Brumley
2PHYSICS REVIEWTHE FOLLOWING QUESTIONS PROVIDE A GOOD REVIEW TO MOTION CONCEPTS. AT THE END OF THE PRESENTATION, YOU MAY CHECK YOUR ANSWERS. IT IS SUGGESTED THAT YOU GO BACK AND CHECK THE QUESTIONS THAT YOU MISSED.
3FREE FALLA feather and a penny fall at with the same acceleration when they are in a vacuum. Why won’t they outside of a vacuum ?A. the penny has a larger mass.B. metal is more attracted to the Earth.C. the feather has more air resistance.
4FREE FALL How should you place your body to fall faster ? A. in a spread eagle position.B. in a ball.C. changing your position won’t make you fall faster.
5VELOCITY GRAPHSQuestion: “Inconsistent” Ivan walks at a constant speed, stops, and then accelerates. Describe the three curves that will make up his position vs. time graph.A. diagonal line, horizontal line, curve.B. horizontal line, diagonal line, curve.C. curve, horizontal line, diagonal line.
6VELOCITY VECTORSA plane is flying with a speed of 190 Km/h, East, when it encounters a wind blowing 25 km/h, West. What will a person on the ground observe to be the plane’s velocity ?A km/h, EastB km/h, EastC km/h, East
7VELOCITY VECTORSA boat heads across a 150 meter river with a speed of 10 m/s. The current flows at a rate of 5 m/s. What is the boat’s resultant velocity ?A m/s straight acrossB m/s, 26.6 degrees downstreamC m/s, 26.6 degrees upstream
8VELOCITY VECTORSA river is 100 meters wide. A boat heads straight across it with a speed of 10 m/s. The current of the river flows at 10 m/s. How long will it take the boat to cross ?A secondsB secondsC seconds
9VELOCITY-TIME GRAPHSHow can the the distance an object has traveled be found from a velocity-time graph ?A. from the slope of the lineB. from the area under the curve.C. by multiplying the final velocity by time.
10MOTION PROBLEMSJoggin’ Joe, starting from rest, accelerates at a rate of 4.5 meters per second squared for 5 seconds. How far will he have run ?A metersB metersC meters
11MOTION PROBLEMSSpiderman accidentally falls off a 50 meter tall building while pursuing the evil Doctor Octopus. If he falls to a height of 20 meters before he is able to catch himself, what will his final speed be ?A m/sB m/sC m/s
12VELOCITY & ACCELERATION Describe the motion of on object which has a positive velocity but a negative acceleration.A. speeding up, going to the right.B. slowing down, going to the right.C. speeding up, going to the left.
13MOTION PROBLEMA student throws a ball upward. 5 seconds later she reaches out and catches it. How high did the ball rise ?A metersB metersC meters
14VELOCITYA driver drives 50 km/h for a distance of 100 km. A second driver drives 25 km/h for 50 km and then 75 km/h for the next 50 km. Which driver will finish faster ?A. The first driverB. The second driverC. They both will finish in the same time.
15LAST -- & TOUGHEST -- QUESTION A swimmer wishes to head straight across a river. He can swim 10 m/s in still water and the current flows at a rate of 5 m/s. What should his heading be ?A degrees upstreamB degrees upstreamC degrees upstream