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What is the equation for acceleration?



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Calculate the acceleration of a bus whose spees changes from 6 m/s to 12 m/s over a period of 3 seconds. 


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THE SCIENCE GAME
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Find the acceleration of a train whose speed increases from 7 m/s to 17 m/s in 120 seconds. 


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A bicycle acceleraties from rest to 6 m/s in 2 seconds. What is the bicycle's acceleration? 


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Why did friction made it difficult to discover Newton's First Law of Motion? 


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For the following actions, explain whether the forces involved are balanced or unbalanced.
 You push a box until it moves.
 You push a box but it doesn't move.
 You stop pushing a box and it slows down.



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John can run 50 yards in 10 seconds and Jane can run 100 yards in 20 seconds. Who has a faster speed? (Remember speed equals distance divided by time.)
a. John has a faster speed.
b. Jane has a faster speed.
c. They both have the same speed. 


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Calculate the momentum of a 14kg bicycle traveling north at 2 m/s. 


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Identify two pieces of information you need to know the velocity of an object. 


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Calculate the average velocity of a dancer who moves 5 meters to the left of the stage over the course of 15 seconds. 


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A line on a distancetime graph becomes _______ as an object's speed increases. 


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An airplane flew a distance of 650 kilometers at an average spees of 300 km/h. HOw much time did the flight take? 


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You start to roll backward down a hill on your bike, so you use the brakes to stop our motion. In what direction did you accelerate? 


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Infer the motion of a car whose speedtime graph shows a horizontal line, followed by a straight line that slopes downward to the bottom of a graph. 


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Compare and contrast speed, velocity, and acceleration. 


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What is the difference between static friction and sliding friction? 


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Explain whether a force is acting on a car that is moving at 20 km/h and turns to the left. 


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THE SCIENCE GAME
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Describe the factors that cause static friction between two surfaces to increase. 


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You are racing a cart down the hallway. If you go 10 meters in 5 seconds, what is your speed? (Remember speed equals distance divided by time.)
a. 2 meters per second
b. 2 miles per hour
c. 50 meters per second 


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Explain whether an object can be moving if the net force acting on the object if zero. 

