science
Grade-7
Easy

Question

A ball is dropped from the top of the building reaches a speed of ___ m/s after 10 s.

hintHint:

When any object is falling free from a height then it will expirence the acceleration of 9.8ms-2

The correct answer is: 98


    Given: 
    • Initial speed of ball (u) = 0 ms-1
    • Final speed of ball (v) = ?
    • Time taken = 10s 
    • Acceleration (a or g) = 9.8ms-2
    Formula used:
    v = u + at
    v space equals space 0 space plus space 9.8 space cross times space 10 space
v space equals space 9 space 8 space m s to the power of negative 1 end exponent
    Answer: 
    A ball is dropped from the top of the building reaches a speed of 98ms-1 after 10 seconds.

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