Sir Eman's Online Physics Quiz No. 03

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| By Emankulit
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Emankulit
Community Contributor
Quizzes Created: 3 | Total Attempts: 817
| Attempts: 169
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  • 1/16 Questions

    The average speed of a horse that gallops a distance of 10 kilometers in a time of 30 minutes is ______.express answers in kph. example: 90 kph

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Sir Eman
About This Quiz

Topic: Describing Linear and Non-Linear Motion
Time Limit: 30 minutes

Reminders:
+ Provide the Necessary Information. Type your WHOLE NAME. No nicknames please.
+ The quiz is TIMED. You can only answer the quiz within the set amount of time given to you.
+ You might need scratch paper for some problems. (yes may SOLVING po)
+ Open books and notebooks. Yes calculators. Yes internet (kung andun ba ang sagot eh)
+ Have your calculators ready beside you. You might be computing something =]
+ IP Detection is enabled. Therefore: I can track your individual IP addresses, I can determine the TIME you took the quiz, I know how long it took you to answer the quiz, etc.
+ You are only allowed to take the quiz ONCE.

PS:
+ If i ever detected CHEATING (e. G. Taking the quiz multiple times and/or using different aliases/names), your quiz wouldn't be counted. =]


Quiz Preview

  • 2. 

    Motion that is under the influence of gravity alone.

    Explanation
    Free fall refers to the motion of an object when it is only influenced by gravity, with no other forces acting upon it. In free fall, the object experiences a constant acceleration due to gravity, causing it to fall towards the Earth without any resistance or external forces. This motion is commonly observed when an object is dropped from a height or when a skydiver jumps out of a plane. During free fall, the object's velocity increases continuously, leading to a rapid increase in its speed as it falls downwards.

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  • 3. 

    Uniformly accelerated motion that is a combination of horizontal and vertical motion that is independent of one another.

    Explanation
    nasa notes iyan. tingin-tingin na lang.

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  • 4. 

    It is the path followed by a projectile thrown at an angle.

    Explanation
    nasa notes iyan. tingin-tingin na lang.

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  • 5. 

    A bullet is dropped from the top of the Empire State Building while another is fired downward from the same location. Neglecting air resistance, the acceleration

    • Of the fired bullet is greater

    • Of the dropped bullet is greater

    • Each bullet is 9.8 m/s^2

    • Malay ko ba? anung klaseng tanong ito?

    Correct Answer
    A. Each bullet is 9.8 m/s^2
    Explanation
    free fall. acceleration due to free fall for any of the bullets is the same, 9.8 m/s^2

    ang nagsagot ng D ay may minus. seriously =]

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  • 6. 

    Drop a rock from a 5-m height and it accelerates at 10 m/s2 and strikes the ground 1 second later. Drop the same rock from a height of 10 m and its acceleration of fall is

    • About half

    • About double

    • The same

    • More than double

    Correct Answer
    A. The same
    Explanation
    acceleration due to gravity is 'almost' constant at the surface of the earth. so raising or lowering the height of releasing an object would have no significant effect. =]

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  • 7. 

    When a rock thrown straight upwards gets to the exact top of its path, its

    • Velocity is zero and its acceleration is zero.

    • Velocity is zero and its acceleration is about 10 m/s^2

    • Velocity is about 10 m/s and its acceleration is zero.

    • Velocity is about 10 m/s and its acceleration is about 10 m/s^2

    Correct Answer
    A. Velocity is zero and its acceleration is about 10 m/s^2
  • 8. 

    An apple falls from a tree and hits the ground 5 meters below. It hits the ground with a speed of about

    • 5 m/s

    • 10 m/s

    • 15 m/s

    • 20 m/s

    • Not enough information was given to estimate

    Correct Answer
    A. 10 m/s
    Explanation
    The apple falls from a height of 5 meters, and we know that the acceleration due to gravity is approximately 9.8 m/s^2. Using the equation v^2 = u^2 + 2as, where v is the final velocity, u is the initial velocity (which is 0 in this case), a is the acceleration, and s is the distance fallen, we can calculate the final velocity. Plugging in the values, we get v^2 = 0 + 2(9.8)(5), which simplifies to v^2 = 98. Solving for v gives us v ≈ √98 ≈ 9.9 m/s, which is closest to 10 m/s.

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  • 9. 

    At one instant an object in freefall is moving upward at 50 m/s. One second later its speed is about

    • 100 m/s

    • 60 m/s

    • 55 m/s

    • 50 m/s

    • 40 m/s

    Correct Answer
    A. 40 m/s
    Explanation
    common sense na lang ang paganahin naten dito.
    the rock is in freefall therefore it a = 10 m/s^2
    after moving upward for 1 second, it decelerates, thus reducing its speed by about 10 m/s

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  • 10. 
    Which two graphs best represent the motion of an object falling freely from rest near the Earth's surface? - ProProfs

    Which two graphs best represent the motion of an object falling freely from rest near the Earth's surface?

    • Set 1

    • Set 2

    • Set 3

    • Set 4

    Correct Answer
    A. Set 1
    Explanation
    Set 1 na ang pinakamalapit. As the object falls, its speed increases and its acceleration remains at a constant
    9.8 m/s^2

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  • 11. 

    At one instant an object in freefall is moving downward at 50 m/s. One second later its speed is about

    • 25 m/s

    • 50 m/s

    • 55 m/s

    • 60 m/s

    • 100 m/s

    Correct Answer
    A. 60 m/s
    Explanation
    common sense na lang ang paganahin naten dito.
    the rock is in freefall therefore it a = 10 m/s^2
    after falling for 1 second, it gains a speed of 10 m/s

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  • 12. 
    Which graph best represents the motion of a block accelerating uniformly down an inclined plane? - ProProfs

    Which graph best represents the motion of a block accelerating uniformly down an inclined plane?

    • (1)

    • (2)

    • (3)

    • (4)

    Correct Answer
    A. (4)
    Explanation
    the d vs t graph for an object accelerating uniformly will look like that. check notes. =]

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  • 13. 

    If an object falls with constant acceleration, the velocity of the object must

    • Be constant also.

    • Continually change by the same amount each second.

    • Continually change by varying amounts depending on its speed.

    • Continually decrease.

    • None of these

    Correct Answer
    A. Continually change by the same amount each second.
    Explanation
    acceleration due to gravity is 'almost' constant at the surface of the earth. so constant acceleration means constant increase in velocity =]

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  • 14. 

    If a projectile is fired straight up at a speed of 30 m/s, the total time to return to its starting position is about

    • 3 seconds

    • 4 seconds

    • 5 seconds

    • 6 seconds

    Correct Answer
    A. 6 seconds
    Explanation
    When a projectile is fired straight up, it will reach its highest point and then fall back down due to gravity. The time it takes to reach the highest point is equal to the time it takes to fall back down to its starting position. The total time can be calculated by dividing the total distance traveled by the projectile by its average speed. Since the projectile is fired straight up, the total distance traveled is twice the distance from the starting position to the highest point. Therefore, the total time to return to its starting position is longer than the time it takes to reach the highest point. Given that the initial speed is 30 m/s, it will take approximately 6 seconds for the projectile to return to its starting position.

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  • 15. 

    As an object freely falls, its

    • Velocity increases

    • Acceleration increases

    • Both of these

    • None of these

    Correct Answer
    A. Velocity increases
    Explanation
    when an object in undergoing freefall, it is under the influence of the Earth's gravitational pull causing it to accelerate uniformly and thus increasing its velocity as it falls =]

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  • 16. 

    While a car travels aroud a circular track at constant speed its

    • Acceleration is zero

    • Velocity is zero

    • Both of these

    • None of these

    Correct Answer
    A. None of these
    Explanation
    While a car travels around a circular track at a constant speed, its velocity is not zero because velocity is a vector quantity that includes both speed and direction. The car is continuously changing its direction as it moves along the circular track, so its velocity is not zero. Additionally, the car's acceleration is also not zero because acceleration is the rate of change of velocity. Even though the car is moving at a constant speed, it is constantly changing its direction, which means it is experiencing acceleration. Therefore, the correct answer is none of these.

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  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jun 28, 2009
    Quiz Created by
    Emankulit
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