Question

directions: complete the paragraph by filling in the blanks.

1. because the velocity of an object depends on 7. as well as

, the velocity of an object can change even as the

1. of the object remains constant. imagine race cars going around an

oval track. even if their 10. remains constant, their velocity changes
because the 11. of their motion is changing.

if a car is traveling on a street and slows down, its speed 12. , and the
car has negative 13. . then the car speeds up, giving it positive

1. . when the car was slowing down, the 15. was in the opposite 16. .

to calculate a change in velocity, subtract the 18. from the

1. . if the direction of motion does not change and the object moves in

a straight line, the change in velocity is the same as the change in 20. .

chapter resources • motion
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Explanation:

To solve this fill - in - the - blank problem about motion (a topic in Physics, which is a subfield of Natural Science), we use our knowledge of motion concepts:

Question 7 - 8

Step 1: Recall velocity components

Velocity is a vector quantity, so it depends on both speed (magnitude) and direction. So for blank 7, we put "speed", and for blank 8, we consider the case when speed is constant but direction changes. The sentence would be: "Because the velocity of an object depends on 7. speed as well as 8. direction, the velocity of an object can change even as the..."

Question 9 - 11

Step 1: Analyze race cars on oval track

Race cars on an oval track: their speed (magnitude of velocity) can remain constant, but their velocity changes because the direction of their motion is changing. So blank 9: "speed", blank 10: "speed", blank 11: "direction". The sentence: "Imagine race cars going around an oval track. Even if their 10. speed of the object remains constant, their velocity changes because the 11. direction of their motion is changing."

Question 12 - 13

Step 1: Car slowing down and speeding up (acceleration)

When a car slows down while moving on a street, its speed decreases, and since it's slowing down (opposite to direction of motion), the car has negative acceleration (acceleration is change in velocity over time). So blank 12: "decreases", blank 13: "acceleration". The sentence: "If a car is traveling on a street and slows down, its speed 12. decreases, and the car has negative 13. acceleration. Then the car speeds up, giving it positive..."

Question 14 - 16

Step 1: Analyze car's acceleration direction

When the car was slowing down, the acceleration was in the opposite direction of the velocity (or motion). So blank 14: "acceleration", blank 15: "velocity" (or "motion"), blank 16: "direction". The sentence: "14. Acceleration. When the car was slowing down, the 15. velocity was in the opposite 16. direction."

Question 17 - 19

Step 1: Calculate change in velocity

To calculate a change in velocity, subtract the initial velocity from the final velocity. So blank 17: "final velocity", blank 18: "initial velocity", blank 19: "acceleration" (since change in velocity over time is acceleration, and here we are talking about the method to calculate change in velocity which relates to acceleration). The sentence: "To calculate a change in velocity, subtract the 18. initial velocity from the 17. final velocity. 19. Acceleration."

Question 20

Step 1: Direction and change in velocity

If the direction of motion does not change and the object moves in a straight line, the change in velocity is the same as the change in speed (since direction is constant, only magnitude - speed - changes). So blank 20: "speed". The sentence: "If the direction of motion does not change and the object moves in a straight line, the change in velocity is the same as the change in 20. speed."

Final Answers (filling the blanks in order):

1. speed; 8. direction; 9. speed; 10. speed; 11. direction; 12. decreases; 13. acceleration; 14. acceleration; 15. velocity; 16. direction; 17. final velocity; 18. initial velocity; 19. acceleration; 20. speed

Answer:

To solve this fill - in - the - blank problem about motion (a topic in Physics, which is a subfield of Natural Science), we use our knowledge of motion concepts:

Question 7 - 8

Step 1: Recall velocity components

Velocity is a vector quantity, so it depends on both speed (magnitude) and direction. So for blank 7, we put "speed", and for blank 8, we consider the case when speed is constant but direction changes. The sentence would be: "Because the velocity of an object depends on 7. speed as well as 8. direction, the velocity of an object can change even as the..."

Question 9 - 11

Step 1: Analyze race cars on oval track

Race cars on an oval track: their speed (magnitude of velocity) can remain constant, but their velocity changes because the direction of their motion is changing. So blank 9: "speed", blank 10: "speed", blank 11: "direction". The sentence: "Imagine race cars going around an oval track. Even if their 10. speed of the object remains constant, their velocity changes because the 11. direction of their motion is changing."

Question 12 - 13

Step 1: Car slowing down and speeding up (acceleration)

When a car slows down while moving on a street, its speed decreases, and since it's slowing down (opposite to direction of motion), the car has negative acceleration (acceleration is change in velocity over time). So blank 12: "decreases", blank 13: "acceleration". The sentence: "If a car is traveling on a street and slows down, its speed 12. decreases, and the car has negative 13. acceleration. Then the car speeds up, giving it positive..."

Question 14 - 16

Step 1: Analyze car's acceleration direction

When the car was slowing down, the acceleration was in the opposite direction of the velocity (or motion). So blank 14: "acceleration", blank 15: "velocity" (or "motion"), blank 16: "direction". The sentence: "14. Acceleration. When the car was slowing down, the 15. velocity was in the opposite 16. direction."

Question 17 - 19

Step 1: Calculate change in velocity

To calculate a change in velocity, subtract the initial velocity from the final velocity. So blank 17: "final velocity", blank 18: "initial velocity", blank 19: "acceleration" (since change in velocity over time is acceleration, and here we are talking about the method to calculate change in velocity which relates to acceleration). The sentence: "To calculate a change in velocity, subtract the 18. initial velocity from the 17. final velocity. 19. Acceleration."

Question 20

Step 1: Direction and change in velocity

If the direction of motion does not change and the object moves in a straight line, the change in velocity is the same as the change in speed (since direction is constant, only magnitude - speed - changes). So blank 20: "speed". The sentence: "If the direction of motion does not change and the object moves in a straight line, the change in velocity is the same as the change in 20. speed."

Final Answers (filling the blanks in order):

1. speed; 8. direction; 9. speed; 10. speed; 11. direction; 12. decreases; 13. acceleration; 14. acceleration; 15. velocity; 16. direction; 17. final velocity; 18. initial velocity; 19. acceleration; 20. speed