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\[ \text { CAPS - Grade } 10 \] DBENovember 2016 QUESTION 5 (Start on a new page.) A woman is at the shopping mall \( 10 \mathrm{~m} \) above the grot \( \mathrm{c} \). Her cellphone, with a mass of \( 0,01 \mathrm{~kg} \), falls and hits the ground at a speed of \( 14 \cdot m \cdot \mathrm{s}^{-1} \). Ignore the effects of air resistance. 5.1 Convert \( 14 \mathrm{~m} \cdot \mathrm{s}^{-1} \) to \( \mathrm{km} \cdot \mathrm{h}^{-1} \). 5.2 Define the term kinetic energy. 5.3 Calculate the gravitational potential energy of the cellphone at a height of \( 5 \mathrm{~m} \) above the ground. 5.4 Calculate the velocity of the cellphone at a height of \( 5 \mathrm{~m} \) above the ground. 5.5 Will the value of the cellphone's mechanical energy just before it hits the ground be GREATER. THAN, LESS THAN or EQUAL TO the mechanical energy at a height of \( 5 \mathrm{~m} \) ? Explain the answer. (4) (3) [14

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\text { CAPS - Grade } 10
\]
DBENovember 2016
QUESTION 5 (Start on a new page.)
A woman is at the shopping mall \( 10 \mathrm{~m} \) above the grot \( \mathrm{c} \). Her cellphone, with a mass of \( 0,01 \mathrm{~kg} \), falls and hits the ground at a speed of \( 14 \cdot m \cdot \mathrm{s}^{-1} \). Ignore the effects of air resistance.
5.1 Convert \( 14 \mathrm{~m} \cdot \mathrm{s}^{-1} \) to \( \mathrm{km} \cdot \mathrm{h}^{-1} \).
5.2 Define the term kinetic energy.
5.3 Calculate the gravitational potential energy of the cellphone at a height of \( 5 \mathrm{~m} \) above the ground.
5.4 Calculate the velocity of the cellphone at a height of \( 5 \mathrm{~m} \) above the ground.
5.5 Will the value of the cellphone's mechanical energy just before it hits the ground be GREATER. THAN, LESS THAN or EQUAL TO the mechanical energy at a height of \( 5 \mathrm{~m} \) ? Explain the answer.
(4)
(3)
[14

CAPS - Grade 10

DBENovember 2016
QUESTION 5 (Start on a new page.)
A woman is at the shopping mall 10 m above the grot c. Her cellphone, with a mass of 0,01 kg, falls and hits the ground at a speed of 14 · m ·s^-1. Ignore the effects of air resistance.
5.1 Convert 14 m·s^-1 to km·h^-1.
5.2 Define the term kinetic energy.
5.3 Calculate the gravitational potential energy of the cellphone at a height of 5 m above the ground.
5.4 Calculate the velocity of the cellphone at a height of 5 m above the ground.
5.5 Will the value of the cellphone's mechanical energy just before it hits the ground be GREATER. THAN, LESS THAN or EQUAL TO the mechanical energy at a height of 5 m ? Explain the answer.
(4)
(3)
[14

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