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**Motion review by Jon Brumley**

PHYSICS Motion review by Jon Brumley

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PHYSICS REVIEW THE 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.

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FREE FALL A 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.

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**FREE 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.

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VELOCITY GRAPHS Question: “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.

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VELOCITY VECTORS A 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, East B km/h, East C km/h, East

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VELOCITY VECTORS A 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 across B m/s, 26.6 degrees downstream C m/s, 26.6 degrees upstream

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VELOCITY VECTORS A 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 seconds B seconds C seconds

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VELOCITY-TIME GRAPHS How can the the distance an object has traveled be found from a velocity-time graph ? A. from the slope of the line B. from the area under the curve. C. by multiplying the final velocity by time.

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MOTION PROBLEMS Joggin’ 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 meters B meters C meters

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MOTION PROBLEMS Spiderman 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/s B m/s C m/s

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**VELOCITY & 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.

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MOTION PROBLEM A student throws a ball upward. 5 seconds later she reaches out and catches it. How high did the ball rise ? A meters B meters C meters

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VELOCITY A 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 driver B. The second driver C. They both will finish in the same time.

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**LAST -- & 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 upstream B degrees upstream C degrees upstream

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Section 2 Extra Questions

Section 2 Extra Questions

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