Question 1.
The newton is a unit of
| A. | charge | |
| B. | volume | |
| C. | weight | |
| D. | frequency | |
Question 1.
The force of gravity pulling on an object is called its
| A. | shape | |
| B. | mass | |
| C. | volume | |
| D. | weight | |
Question 1.
People in Australia do not fall off the Earth because
| A. | the air pulls them down | |
| B. | the Earth pulls them down | |
| C. | the Earth is spinning around | |
| D. | Australia is a large island | |
Question 1.
Calculate the weight of each of the following on Earth :
(show your working for each calculation)
(a) A girl whose mass is 50kg……………………………….___________________
(b) A dog of mass 20kg………………………………………___________________
(c) A 9 kg box……………………………………………..…..___________________
(d) A ball of mass 0.5 kg.
Question 1.
An unmanned spacecraft is on a mission to Mars. The spacecraft has a mass of 900 kg
a) What is the weight of the spacecraft on Earth?
b) The table below gives some information on the planets.
Copy and complete the following sentence by underlining the correct word or phrase.
c) How would the weight of the spacecraft on Mars compare with its weight on Earth?
Question 1.
Calculate the mass of each of the following weighed on Earth:
(show your working for each calculation)
(a) A man who weighs 750N……………………………………_______________
(b) A tin of peas which weighs 4.5N…………………………..________________
(c) A chair which weighs 350N…………………………………________________
(d) A rabbit which weighs 40N…………………………………….________________
Question 1.
The diagrams show a student using a bow and arrow. The bow string on the bow is used to fire the arrow forward.
a) State one change the student could make, without changing the force with which the bowstring is pulled back, so that the arrow would travel a greater distance.
b) Describe how gravity affects the path of the arrow as it flies to the target.
