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Reading Check Questions
Terms in this set (12)
As you read in you chair, how fast are you moving relative to the chair? Relative to the Sun?
My speed is zero kilometers per hour. Relative to the sun, you are moving 107,000.
What kind of speed is registered by an automobile speedometer: average speed or instantaneous?
How far does a horse travel if it gallops at an average speed of 25 km/h for 30 min?
The horse travels 12.5 kilometers.
If a car moves with a constant velocity, does it also move with a constant speed?
Yes it moves with a constant speed and constant direction.
What is the acceleration of a car moving along a straight road that increases its speed from 0 to 100 km/h in 10 s?
When are you most aware of your motion in a moving vehicle: when it is moving steadily in a straight line or when it is it is accelerating? If you were in a car that moved with absolutely constant velocity(no bumps at all), would you be aware of motion?
You are most aware when it is accelerating. No because of that constant velocity that gives the idea that you are going in a straight line steadily.
What did Galileo discover about the amount of speed a ball gained each second when rolling down an inclined plane? What did they say about the ball's acceleration?
He found that a ball rolling down an inclined plane picks up the same amount of speed in successive seconds; that is the ball rolls with unchanging acceleration- constant acceleration.
What exactly is meant by a "freely falling" object?
An object in free fall falls under gravity alone with no friction.
What is the speed acquired by a freely falling object 5 s after being dropped from a rest position? What is the speed 6 s after?
The speed is 50 m/s after 5 s and 60 m/s after 6 s.
When an object is thrown upward, how much speed does it lose each second (ignoring air resistance)?
It loses 10 m/s of speed each second until it reaches the high point, then it gains 10 m/s each second.
What is the distance fallen for a freely falling object 1 s after being dropped from a rest position? What is the distance for a 4-s drop?
It falls 5 m in 1 s and 80 m in 4 s.
Consider these measurements 10 m, 10 m/s, and 10 m/s2, which is a measure of speed, which is a measure of distance, and which is a measure of acceleration?
10 m is distance, 10 m/s is speed, and 10 m/s2 is acceleration.
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Reading Check Questions_Ch6_Karla_Alonso
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