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Q1.
The figure below shows a toy car in different positions on a racing track.
The car is released from rest at position A and accelerates due to gravity down the track to position B.
mass of toy car = 0.040 kg
vertical height between position A and position B = 90 cm
gravitational field strength = 9.8 N/kg
Calculate the maximum possible speed of the toy car when it reaches position B.
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Speed = _______________ m/s (5)
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Ep=m×g×h
Ep=0.040×9.8×0.90
Ep=0.3528J
Ek= 1/2mv 2
0.3528=0.5×0.040×v2
v2=0.3528/0.5×0.040
v=4.2m/s

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