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A pebble is thrown vertically upwards wi...

A pebble is thrown vertically upwards with a speed of 20 m `s^(-1)`. How high will it be after 2 s? (Take g = 10 m `s^(-2)`)

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AI Generated Solution

To solve the problem of how high the pebble will be after 2 seconds when thrown vertically upwards with an initial speed of 20 m/s, we can use the following steps: ### Step-by-Step Solution: 1. **Identify the given values:** - Initial velocity (u) = 20 m/s (upwards) - Time (t) = 2 s - Acceleration due to gravity (g) = -10 m/s² (negative because it acts downwards) ...
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Knowledge Check

  • A girl standing on a stationary lift (open from above) throws a ball upwards with initial speed 50 m s^(-1) . The time taken by the ball to return to her hands is (Take g = 10 m s^(-2) )

    A
    a. 5 s
    B
    b. 10 s
    C
    c. 15 s
    D
    d. 20 s

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