B. Circle the letter of the correct answer.
1. If you run a 100-meter race in 20 seconds, what is your average speed during the race?
A. 20 m/s B. 10 m/s C. 5 m/s D. 2 m/s
2. Tony ran at a constant speed of 10 m/s for a total of 60 seconds. How far did he run?
A. 6 m B. 60 m C. 600 m D. 6000 m
3. If you use an arrow to represent velocity, what does the length of the arrow represent?
A. time B. speed C. distance D. direction
4. Which choice(s) could represent the velocity of a moving car?
A. 80 mi/h B. 40 km/h C. 50 km/h north D. all of the above
5. Which quantity is a vector?
A. speed B. velocity C. direction D. Distance
C. Fill in the blank with the appropriate term.
1. The SI unit for speed is __________.
2. The slope of a distance-time graph represents the __________ of a moving object.
3. Change in distance divided by change in time equals __________ speed.
4. A straight line on a distance-time graph represents a(n) __________ speed.
5. A horizontal line on a distance-time graph represents a speed of __________.
6. The velocity of a moving object is constant only if the object’s speed and __________ are
unchanging.
7. Velocity is a vector because it includes both size and __________.
Answer this properly i don't want wrong answers. This is not a joke
1. If you run a 100-meter race in 20 seconds, what is your average speed during the race?
A. 20 m/s B. 10 m/s C. 5 m/s D. 2 m/s
2. Tony ran at a constant speed of 10 m/s for a total of 60 seconds. How far did he run?
A. 6 m B. 60 m C. 600 m D. 6000 m
3. If you use an arrow to represent velocity, what does the length of the arrow represent?
A. time B. speed C. distance D. direction
4. Which choice(s) could represent the velocity of a moving car?
A. 80 mi/h B. 40 km/h C. 50 km/h north D. all of the above
5. Which quantity is a vector?
A. speed B. velocity C. direction D. Distance
C. Fill in the blank with the appropriate term.
1. The SI unit for speed is __________.
2. The slope of a distance-time graph represents the __________ of a moving object.
3. Change in distance divided by change in time equals __________ speed.
4. A straight line on a distance-time graph represents a(n) __________ speed.
5. A horizontal line on a distance-time graph represents a speed of __________.
6. The velocity of a moving object is constant only if the object’s speed and __________ are
unchanging.
7. Velocity is a vector because it includes both size and __________.
Answer this properly i don't want wrong answers. This is not a joke
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B. Circle the letter of the correct answer.
1. If you run a 100-meter race in 20 seconds, what is your average speed during the race?
Data:
d = 100 m
t = 20 s
V = ?
The formula for uniform motion is
V = d/t
Where
Since we must calculate the speed, it is not necessary to do the formula clearance. We substitute data and solve:
V = 100 m/20 s
V = 5 m/s
Answer: If I run a 100 meter race in 20 seconds, my average speed for that race is 5 m/s. Alternative C.
2. Tony ran at a constant speed of 10 m/s for a total of 60 seconds. How far did he run?
Data:
V = 10 m/s
t = 60 s
d = ?
The formula for uniform motion is
V = d/t
Where
clear for distance:
d = v × t
d = 10 m/s × 60 s
d = 600 m
Answer: If Tony ran at 10 m/s in 60 seconds, he covered 600 meters. Alternative C
3. If you use an arrow to represent velocity, what does the length of the arrow represent?
D. direction
4. Which choice(s) could represent the velocity of a moving car?
All of the above (A. 80 mi/h, B. 40 km/h, C. 50 km/h north) could represent the velocity of a moving car. The velocity is a vector quantity, having both magnitude (speed) and direction. D. all of the above
5. Which quantity is a vector?
Velocity is a vector quantity. Alternative B
C. Fill in the blank with the appropriate term.
1. The SI unit for speed is m/s.
2. The slope of a distance-time graph represents the velocity of a moving object.
3. Change in distance divided by change in time equals average speed.
4. A straight line on a distance-time graph represents a(n) constant speed.
5. A horizontal line on a distance-time graph represents a speed of zero.
6. The velocity of a moving object is constant only if the object’s speed and direction are unchanging.
7. Velocity is a vector because it includes both size and direction.