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A bus decreases its speed from 72 km//h ...

A bus decreases its speed from `72 km//h` to `54 km//h` in `10 s`. Calculate the acceleration of the bus.

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To calculate the acceleration of the bus, we can use the formula for acceleration: \[ \text{Acceleration} (a) = \frac{\text{Final Velocity} (v_f) - \text{Initial Velocity} (v_i)}{\text{Time} (t)} \] ### Step 1: Convert the speeds from km/h to m/s The initial speed \( v_i = 72 \text{ km/h} \) and the final speed \( v_f = 54 \text{ km/h} \). We need to convert these speeds into meters per second (m/s) using the conversion factor \( 1 \text{ km/h} = \frac{1}{3.6} \text{ m/s} \). ...
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Knowledge Check

  • A car increases its speed from 20 km//h to 50 km//h in 10 seconds. What is its acceleration?

    A
    0.5 units
    B
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    C
    0.91 units
    D
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  • A bus increases its speed from 36 km/h to 72 km/h in 10 seconds. Its acceleration is :

    A
    `5 m//s^(2)`
    B
    `2m//s^(2)`
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    `3.6 m//s^(2)`
    D
    `1 m//s^(2)`

  • A car increase its speed from 20 km/h to 50 km/h in 10 seconds. Its acceleration is

    A
    30 m `s^(-2)`
    B
    30 m `s^(-2)`
    C
    18 m `s^(-2)`
    D
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