Shc Mechanics Test 1

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    How many metres in one kilometre?

    • 100
    • 10
    • 1000
    • 10,000
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About This Quiz


Quiz about units used in mechanics and motion graphs and constant acceleration equations

Shc Mechanics Test 1 - Quiz

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  • 2. 

    The slope of a distance time graph gives us _______________ of an object.

    • Speed

    • Acceleration

    • Distance

    • Displacement

    Correct Answer
    A. Speed
    Explanation
    The slope of a distance-time graph represents the change in distance over time. In other words, it shows how fast an object is moving. Therefore, the correct answer is speed.

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  • 3. 

    A mass of 3 kg is initially at rest. It accelerates at a rate of 4ms-2 . Calculate its speed after 5 seconds of acceleration.

    • 10

    • 15

    • 18

    • 20

    • 22

    Correct Answer
    A. 20
    Explanation
    The speed of an object can be calculated using the formula v = u + at, where v is the final velocity, u is the initial velocity (which is 0 in this case since the object is initially at rest), a is the acceleration, and t is the time. Plugging in the given values, v = 0 + (4 m/s^2)(5 s) = 20 m/s. Therefore, the speed of the object after 5 seconds of acceleration is 20 m/s.

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  • 4. 

    What is the acceleration due to gravity (in ms-2)?

    Correct Answer
    10
    9.8
    Explanation
    The acceleration due to gravity is a constant value that represents the rate at which objects fall towards the Earth. In this case, the given answer includes two options: 10 and 9.8. The correct answer is 9.8, as it is the standard value for the acceleration due to gravity on Earth, usually rounded to 9.8 m/s^2. The option 10 is incorrect as it does not accurately represent the value of the acceleration due to gravity.

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  • 5. 

    A car travelling at 10ms-1for 2 minutes covers a distance of _________________ metres.

    Correct Answer
    1200
    Explanation
    The car is travelling at a constant speed of 10 m/s for 2 minutes. To find the distance covered, we need to multiply the speed by the time. Since 1 minute is equal to 60 seconds, the total time in seconds is 2 minutes x 60 seconds/minute = 120 seconds. Therefore, the distance covered is 10 m/s x 120 seconds = 1200 meters.

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  • 6. 

    The slope a speed - time graph gives us the _______________ of the object

    • Distance

    • Speed

    • Acceleration

    • Velocity

    Correct Answer
    A. Acceleration
    Explanation
    The slope of a speed-time graph gives us the rate at which the speed is changing over time, which is the definition of acceleration. Therefore, the correct answer is acceleration.

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  • 7. 

    What force(s) are acting on a ball as it is moves vertically up in the air?

    • Force of the throw and gravity

    • Gravity

    • Force of the throw and Air Resistance

    • Gravity and Air Resistance

    Correct Answer
    A. Gravity and Air Resistance
    Explanation
    As the ball moves vertically up in the air, two forces are acting on it. Gravity is pulling the ball downwards, trying to bring it back to the ground. At the same time, air resistance is acting on the ball, pushing against its motion and slowing it down. Therefore, the correct answer is gravity and air resistance.

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  • 8. 

    A mass of 2 kg is initially moving at a steady speed of 3 ms-1. It then accelerates at a rate of 2ms-2 . Calculate its speed after accelerating  for 4 seconds.

    • 11

    • 8

    • 14

    • 12

    Correct Answer
    A. 11
    Explanation
    The initial speed of the mass is 3 m/s and it accelerates at a rate of 2 m/s^2 for 4 seconds. To calculate the final speed, we can use the formula: final speed = initial speed + (acceleration * time). Plugging in the values, we get: final speed = 3 + (2 * 4) = 3 + 8 = 11 m/s. Therefore, the correct answer is 11.

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  • 9. 

    What does the area underneath the curve of a speed - time graph represent?

    • Acceleration

    • Distance

    • Speed

    • Velocity

    Correct Answer
    A. Distance
    Explanation
    The area underneath the curve of a speed-time graph represents distance. This is because the area under the curve represents the displacement of an object over a given time interval. In the context of a speed-time graph, the area under the curve represents the distance traveled by the object during that time interval. Therefore, the correct answer is distance.

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  • 10. 

    A mass of 2 kg is initially moving at a steady speed of 3 ms-1. It then accelerates at a rate of 2ms-2 . Calculate the distance it covers during the first 4 seconds of its acceleration

    • 12

    • 16

    • 24

    • 26

    • 28

    Correct Answer
    A. 28
    Explanation
    The distance covered during the first 4 seconds of acceleration can be calculated using the equation: distance = initial velocity * time + 0.5 * acceleration * time^2.

    Given that the initial velocity is 3 m/s, the time is 4 seconds, and the acceleration is 2 m/s^2, we can substitute these values into the equation to find the distance.

    distance = 3 * 4 + 0.5 * 2 * (4^2) = 12 + 0.5 * 2 * 16 = 12 + 16 = 28.

    Therefore, the correct answer is 28.

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  • Current Version
  • Sep 13, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jun 24, 2009
    Quiz Created by
    Rpepping
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