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Question

An airplane accelerates on the runway at 3.0 m s2. It has two engines which exert a total thrust of 3.0× 105N. What is the mass of this airplane?


A

0.5× 105 kg

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B

2.0× 105kg

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C

3.0× 105kg

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D

1.0× 105kg

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Solution

The correct option is D

1.0× 105kg


Force = mass × acceleration

Thrust = mass × acceleration

Acceleration = 3.0 m s2

Total Thrust = 3.0× 105 N

3.0× 105 N = m× 3.0 m s2

m=1× 105 kg


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