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June 16, 2010 at 8:51 PM Worksheet on mass and weight Section A 1. An astronaut on the Moon has A. the same weight and mass as on the Earth B. the same weight but less mass as on the Earth C. less weight but the same mass as on the Earth D. less weight and less mass as on the Earth 2. The acceleration of free fall on Planet X is 2.0m/s^2. The acceleration of free fall on Planet Y is 5.0m/s^2. The mass of an object on Planet X is 20kg. Which statement about the object is correct? A. Its weight on Planet X is 10N B. Its weight on Planet Y is 20kg C. Its weight on Planet Y is 20N D. Its inertia on Planet Y is greater. 3. A body of 30kg is moved to the Moon. if the acceleration due to gravity on the Earth and on the Moon is 10m/s^2 and 1.6m/s^2 respectively, which of the following pairs of values is correct? Weight on Earth (N) ; Weight on Moon (N) A. 30 ; 48 B. 300 ; 300 C. 300 ; 30 D. 300 ; 48 4. An astronaut has a mass of 70kg on Earth. He can jump 1m high off the surface of the Earth, but when he is on the Moon, he can jump higher. This is because, on the Moon A. his mass is less than that on Earth B. his mass is the same as that on Earth C. his weight is less than on Earth D. his weight is the same as that on Earth 5. The mass of a man on the Earth is 60kg. The acceleration due to gravity on the Earth and on the Moon is 10m/s^2 and 1.6m/s^2 respectively. Which of the following pair of values states the correct mass and weight on the Moon. Mass on Moon (kg) ; Weight on Moon (N) A. 60 ; 37.5 B. 10 ; 96 C. 60 ; 96 D. 60 ; 600 6. What is most likely to make an object very stable? Position of centre of mass ; Size of base A. High ; Small B. High ; Large C. Low ; Small D. Low ; Large 7. Which property of a body will affected by a change in graviational field? A. Mass B. Temperature C. Volume D. Weight 8. A load is placed on balance X and then on balance Y. Which is measured by each balance? Balance X ; Balance Y A. mass ; density B. mass ; weight C. weight ; density D. weight ; mass 9. Which of the following depends only on the amount of substance in the body? A. Density B. Mass C. Volume D. Weight 10. A satellite is launched from Earth into the orbit. What happenes to the mass and weight of the satellite? Mass ; Weight A. Decreases ; Stay constant B. Stays constant ; Decreases C. Stays constant ; Increases D. Increases ; Decreases Section B 1. The ___________ of an object is the measure of the amount of matter in the object. It is __________ everywhere in the universe. 2. The __________ of an object is the gravitational force acting on the object. 3. Write down the equation relating mass, m, weight, W and acceleration due to gravity, g. ______________________________________________________________ 4. Acceleration due to gravity on the surfaces of the Earth and the Moon are 10m/s^2 and 1.6m/s^2 respectively. Using tthe given information complete the following table.  5. What is meant by the term 'inertia'? _______________________________________________________________ _______________________________________________________________ 6. Object having greater mass will have __________ inertia. This means that the greater the mass of a body, the more __________ it is to start moving or to stop it from moving. 7. Two large tins are suspended from the ceiling by long strings. One of the tins is filled with sand while the other is empty.  (a) When both tins are given a short sharp push, which one can be moved more easily?________________________________________________________________ (b) While the tins are moving, try and stop them. Which one can be stopped more easily? ________________________________________________________________ (c) Explain your answers to (a) and (b). ________________________________________________________________ ________________________________________________________________ |