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Created by Terri Street Copyright, 2000 1,000,000 500,000 250,000 125,000 64,000 32,000 16,000 8,000 4,000 2,000 1,000 500 300 200 100 Click to return to question, Cont-P to switch to the pen, cross out two incorrect answers, then Cont-A to switch back to pointer. Click to return to the question and poll the class Click on link to Ask Jeeves, or click on this oval to return to question and ask a friend Four solid round objects, each with a different mass, are moving at the same speed. Which ball would require the most force to stop its motion? A. Ball with a mass of 20 kg B. Ball with a mass of 15kg C. Ball with a mass of 10kg D. Ball with a mass of 5kg A. 20 Kg because the more weight an object has the greater force it takes to stop it. Back to Board Which graph represents an object that is decreasing speed? A. C. D i s t a n c e B. Time D i s t a n c e D. Time D i s t a n c e Time D i s t a n c e Time C. D i s t a n c e Time Back to Board A girl walked for 30 minutes. She noticed that she traveled farther in the first 15 minutes of her walk than in the second 15 minutes. What can she conclude about her walk? A. She walked over many hills B. Her average speed was faster C. She walked in two different D. She was walking at a directions during the first ½ hour of her walk constant speed B. Her average speed was faster during the first ½ hour of her walk. Back to Board Which best describes the speed of a ball as it is thrown straight up into the air and comes back down? A. The ball goes slower and slower as it goes up, stops and goes faster and faster As it comes down C. The ball goes up at a constant Speed, stops, then comes down at a Constant speed. B. The ball goes up at a constant speed Stops and increases speed as it comes down. D. The ball goes slower and slower as it goes up, stops and then comes down at a constant speed. A. The ball goes slower and slower as it goes up, stops, and then goes faster and faster as it comes down. Back to Board What can cause a moving object to increase its speed in a forward direction? A. a force pushing on the object B. an increase in the mass C. a decrease in the mass of the Object. D. a force that continually acts on the From the opposite direction. of the object. Object in the direction the object is moving. D. A force that continually acts on the object in the direction the object is moving. Back to Board A student uses a rubber band to launch the four objects shower in the table. Object Mass Paper Clip 0.5 gram Piece of Paper 1 gram Eraser 2 grams Rubber Ball 10 grams If the student pulls the rubber band back at the same amount each time, which object will most likely move the fastest when launched? A. Rubber Ball B. Piece of Paper C. Paper Clip D. Eraser C. Paper Clip because it has less weight Back to Board A pencil falls off of a desk. What moves the pencil towards the floor? A. Mass B. Gravity C. Friction D. Speed B. Gravity pulls objects down to Earth. Back to Board A child rides a wagon down a hill. Eventually, the wagon comes to a stop. Which is most responsible for causing the wagon to stop? A. Gravity acting on the wagon C. Friction acting on the wagon B. The mass of the wagon D. The mass of the child C. Friction acting on the wagon Back to Board What is the speed of an object moving in a specific direction called? A. Speed C. Acceleration B. Mass D. Velocity D. Velocity is the speed of an object moving in a specific direction Back to Board The graph below represents a traveling car. Distance 60 50 40 30 20 10 0 10 20 30 Time 40 50 60 If the car continues to travel at a constant speed, what can be predicted about the distance the car will have traveled after two hours? A. 100 miles B. 120 miles C. 80 miles D. 60 miles B. 120 miles because you will double the distance traveled in one hour. Back to Board What is necessary to determine the speed of an object? A. The distance moved by the object and the time it took to move. C. The shape of the object and the distance it moved. B. The mass and volume of the object. D. The mass of the object and the time it took to move. A. The distance moved by the object and the time it took to move there. Speed = Distance ÷ Time Back to Board The graph below shows the motion of a skate border over time. Based on the graph, what can be inferred about the skateboarder? A. After 30 seconds, he stopped B. After 40 seconds, he moving. traveled back toward the starting point C. After 20 seconds, he traveled D. After 35 seconds, he increased to the right. his speed. B. After 40 seconds, he traveled back toward the starting point Back to Board Which best describes how forces must interact for a sailboat to change direction against water current? A. The force of the person steering B. The force of the wind must be Must be greater than the force of the Water current. Equal to the force of the water current. C. The force of the wind must be D. The force of the wind must be Greater than the force of the water Less than the force of the water current. C. The force of the wind must be greater than the force of the water current. There must be an unbalanced force in order for an object to move. Back to Board Which best describes how forces must interact in order for dust to settle? A. The force of gravity must be less than the force of moving air. C. The force of gravity must be Equal to the force of friction. B. The force of gravity must be less Than the force of friction. D. The force of gravity must be Greater than the force of the moving air D. The force of gravity must be greater than the force of moving air. Back to Board Michael is using the soccer balls below for an experiment. 4 lb 2 lb He kicks the two soccer balls the same amount of force and thinks the heavier ball will go farther. Is he correct? A. No, h is incorrect because the B. No, his is incorrect because the C. Yes, he is correct because the D. Yes, he is correct because the Lighter ball has less mass, so it will Travel farther. Heavier ball has more mass, so it is Affected less by friction. Lighter ball has less mass, so it is Affected more by gravity. heavier ball has more mass, so it will Move farther. A. No, he is incorrect because the lighter ball has less mass, so it will travel farther. Sorry, try again! Thanks for playing!