Physics midterm
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| Definition of Acceleration is the Change in __________ | velocity divided by the time interval
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| A train travels 6 meters in the first second of travel, 6 meters in the second second, and 6 meters again during the third second. It's acceleration is _________ | 0 meters per seconds squared
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| What is a problem that some people blame on technology? | Widespread Pollution
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| Speed is _______ | a measure of how fast an object is moving; distance covered per unit time; always measured in terms of a unit of distance divided by a unit of time
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| When you look at the speedometer of a moving car, you see the car's __________ | Instantaneous speed
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| what is the reason to express scientific findings mathematically? | the findings become more difficult to prove by experiment
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| An object falls freely in a vacuum, its ______ does ______ | Velocity increases
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| With the absence of air resistance, objects fall at a constant _______ | acceleration
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| A ball is thrown upwards and caught when it comes back down. In the absence of air resistance, the speed of the ball, when caught would be __________ | the same as the speed it had when thrown upwards
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| Suppose an object is non free fall. each second the object falls how fast? | it falls with a larger distance than in the second before
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| A ball is thrown straight up. at the top of its path its acceleration is ___ m/s squared? | about 10 meters per second squared
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| When something falls to the ground , it accelerates. This acceleration is called the acceleration due to gravity and is symbolized by the letter g. what is the value of g on earth's surface | about 10 meters per seconds squared
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| A ball is thrown straight up. At the top of its path its instantaneous speed is _______ | 0 m/s squared
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| What is our short cut for meters and kilometers | King Mark's curtled milk might (take a) nap
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| Suppose you take a trip that covers 180 km and takes 3 hours to make. your average speed is ________ | 60 kilometers per hour
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| A ball towed vertically upward rises, reaches its highest point, and then falls back to its starting point. during this time the acceleration of the ball is always ______________ | directed downward
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| If a projectile is fired straight up at a speed of 30m/s the total time to return to its starting point is about ______ seconds | 6 seconds
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| A pensil lies on your desk. If the earth is moving around the sun at a speed of 30 km/s, how fast is the pencil moving relative to the desk? how fast is the pencil moving relative to the sun? | 0 k/s ; 30 km/s
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| two objects move toward each other bc of gravitational attraction. as the objects get closer and closer the force between them ______. | increases
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| The force of gravity on you is greatest when you are standing _____. | on the surface or below the surface
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| compared to it's mass on earth, the mass of a 10 kg object weights _____ on the moon | less
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| which has more mass- kg of feathers or kg of iron? | neither- they're the same weight
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| An object weighs 30N on earth, another 30N on the moon. which has a greater mass? | the one on the moon
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| If you weighed yourself on an elevator in free fall your weight would be ______ | Zero
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| which cooks faster in boiling oil? a sliced potato, whole potato, or both? | a sliced potato
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| When an object reaches its terminal velocity its acceleration is ______ | 0 m/s^2
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