Adwin's answer to Yap Cheng An's Primary 6 Science Singapore question.
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a) The greater the height from which the ball was dropped from, the deeper the dent in the sand.
b) When the ball was dropped from a greater height, it possessed more gravitational potential energy, which were transferred to kinetic energy when it falls and hit the sand.
c) The safety helmet is made from hard and durable materials and will help to absorb the impact of any falling object up to a certain extent. The oval shape of the helmet also allows falling objects to "roll off", thus minimising the impact further if hit at an angle.
b) When the ball was dropped from a greater height, it possessed more gravitational potential energy, which were transferred to kinetic energy when it falls and hit the sand.
c) The safety helmet is made from hard and durable materials and will help to absorb the impact of any falling object up to a certain extent. The oval shape of the helmet also allows falling objects to "roll off", thus minimising the impact further if hit at an angle.
Date Posted:
5 years ago
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