Mass is the amount of matter in an object. Its standard unit of measure is in kilograms (kg). Weight is the force experienced by an object due to gravity. In freefall or in zero-gravity, an object that has mass has no weight. An object on the Moon will have the same mass on Earth, although[…]
Questions involving gravitational force and gravitational potential energy are common in the PSLE. Some are questions that even parents struggle to explain. This may be because a lot of content about forces is simplified for the primary school level. Although this makes the concept less intimidating, it becomes more an exercise of rote learning than[…]
Science tip: Gravitational Potential Energy – the more heavy the object and the higher it is above the ground, the larger its gravitational potential energy. Kinetic Energy – the faster the object is moving and the more heavy it is, the greater its kinetic energy. In this particular question – bag C starts off with[…]
Science tip: Question: Is a helium or hot air balloon affected by gravitational force? Ans: Yes it is! All objects (with mass) in the Earth’s gravitational field are affected by gravity. This includes objects that are lighter than air. The reason hot air balloons float is not because they are weightless, it is because they[…]
Science tip: All objects at the same place experience a gravitational FORCE (or pull) that is proportional to its mass. So the larger the mass, the larger the gravitational force. This force is there regardless of the speed or orientation of the object. It is there whether the object is flying or falling, whether it’s[…]