Acceleration due to gravity reduces as one goes from pole to equator.
Answer
True. Explanation: This means that the centripetal acceleration at the Equator is about 0.03m/ s2 (metres per second squared). This has the effect of slightly increasing your weight at the poles (since you are close to the centre of the Earth and the gravitational force depends on distance) and slightly decreasing it at the equator.
Weight is a vector quantity and mass is a scalar quantity.
Answer
True. Explanation: Weight is a force which is a vector and has a magnitude and direction. Mass is a scalar. Weight and mass are related to one another, but they are not the same quantity. Mass and energy are scalar quantities, while momentum is a vector quantity.
Ships and submarines are designed on the basis of Archimedes Principle.
Answer
True. Explanation: Archimedes principle states that "when an object is immersed in liquid it feels the loss of weight" the amount of weight loss is equal to the amount of water displaced and its weight so ship displaces its own weight on water.