Physics

Question

If an object falls for 4 seconds, how fast is it going when it hits the ground?

1 Answer

  • Acceleration due to gravity is about 9.8 m/s²

    So after every second, the speed increase by 9.8 m/s

    After 1 second, the object would fall at a speed of 9.8 m/s

    After 2 seconds the object would fall at a speed of 19.6 m/s

    So after 4 seconds, the object is going to be at a speed of:

    9.8 x 4 = 39.2 m/s

    -------------------------------------------------

    Answer

    39.2 m/s

NEWS TODAY