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FREE SCIENCE AND STUDY GAMES ABOUT HELUS8CH1
EXAM QUESTIONS
Actual Qs and Ans Expert-Verified Explanation
This Exam contains:
-Guarantee passing score -46 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: The unit for speed is a ___ unit divided by a time unit. The SI unit for speed is ___
Answer:
distance, m/s Question 2: An object that moves at a ____ travels the same distance each and every second
Answer:
constant speed Question 3: A location must be chosen to be the reference point, or ___, of the graph.
Answer:
origin Question 4: To describe an object's position, you must include three pieces of information: a reference point, a reference direction, and the distance from the reference point in the ___.
Answer:
reference direction
Question 5: ___, or the speed of an object at a specific instant of time, is especially useful to measure for objects whose speed changes.
Answer:
Instantaneous speed Question 6: The length of a position vector is the ___ from the reference point to the object whose position the vector represents
Answer:
distance Question 7: The horizontal change, or change along the x-axis, on a graph as an object moves betweentwo points is sometimes called the ___
Answer:
run Question 8: The equation for average speed is average speed = total distance divided by ____.
Answer:
total time Question 9: Negative measurements are usually in the opposite direction from the reference direction.Negative measurements are usually in the ___ direction from the reference direction.They start from the reference point and measure away from the object
Answer:
opposite
Question 10: A ___ is a quantity that has both a size and a direction
Answer:
vector Question 11: Speed is different from ___ because speed does not include the direction in which the object is moving
Answer:
velocity
Question 12: If an object speeds up, its line on a speed-time graph curves up to the right. The steeper the slope, the faster its speed is ___.
Answer:
increasing Question 13: If you know any two quantities in the average speed equation, you can use the equation to calculate the ___.
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third Question 14: A ___ is a starting point used to describe the position of an object.
Answer:
reference point Question 15: One way to describe the position of an object is as an ___ pointing from a reference point toward the object
Answer:
arrow Question 16: When an object changes the direction in which it is moving, its velocity changes.This means that it is ___
Answer:
accelerating Question 17: Vectors are often drawn as ___ pointing away from a reference point in the referencedirection.
Answer:
arrows
Question 18: The ___ of a line is the steepness of the line.
Answer:
slope
Question 19: A ___ measures the change in one quantity in a particular length of time
Answer:
rate Question 20: On a position-time graph, ___ is usually plotted on the y-axis and time is usually plotted on the ___.
Answer:
position, x-axis Question 21: Velocity is a ___. It has both a size (the speed of the object) and a direction (the direction the object is moving)
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vector Question 22: Units like ___ (m), kilometers (km), and centimeters (cm) are used to describe distances.
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meters Question 23: The ___ of a line can be calculated by dividing the rise between two points on the line by the run between the same two points
Answer:
slope Question 24: The ___ is the direction you must travel from the reference point toward an object.
Answer:
reference direction Question 25: The average speed of the entire trip of an object that does not move at constant speed can be calculated by finding the slope between the ___ and ___ data points on the graph of the object's motion.
Answer:
starting, ending
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