Which one of the following statements is not true?

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Q: 41 (CAPF/2016)

Which one of the following statements is not true?

question_subject: 

Science

question_exam: 

CAPF

stats: 

0,36,52,11,23,36,18

keywords: 

{'gravitational force': [0, 0, 0, 6], 'newton second': [0, 0, 0, 1], 'newton': [0, 1, 0, 0], 'force': [0, 0, 0, 2], 'mass': [0, 0, 2, 3], 'uniform velocity': [0, 0, 1, 3], 'momentum': [0, 1, 0, 3], 'weight': [0, 0, 1, 1], 'frictionless surface': [0, 1, 0, 2], 'kg': [0, 1, 9, 24], 'earth': [0, 1, 1, 1], 'si unit': [0, 0, 1, 5], 'body': [27, 3, 23, 37]}

Option 1 states that the gravitational force of Earth acting on a body of mass 1 kg is 9.8 newton. This statement is true and is based on the concept of acceleration due to gravity. On Earth, the acceleration due to gravity is approximately 9.8 m/s², and since force is equal to mass multiplied by acceleration, the gravitational force acting on a 1 kg mass on Earth is indeed 9.8 newton.

Option 2 states that the force acting on an object of mass 5 kg moving with a uniform velocity of 10 m/s on a frictionless surface is zero. This statement is also true. According to Newton`s first law of motion, an object will continue moving with a constant velocity unless acted upon by an external force. In this case, since the object is moving with a uniform velocity and there is no friction to slow it down or any other external force acting on it, the net force on the object is zero.

Option 3 states that the SI unit of weight is kg. This statement is not true. The SI unit of weight is actually the newton (N). Weight is a force, and by definition, the force of an object`s weight is equal to its mass multiplied by the acceleration