Sp2C Mass And Weigjt

Question 1

What is mass

Answer 1

Mass is the quantity of matter there is in an object , and only changes if the object itself changes

Question 2

What is weight

Answer 2

Weight is a measure of the pull of gravity on an object and depends on the strength of gravity .

Question 3

How can weight be measured

Answer 3

Weight can be measured using a force meter which has a scale in newtons . Many force meters contain a string which stretches as the force increases allowing the weight to be read off the scale

Question 4

Weight equation

Answer 4

Weight = mass x gravitational field strength

Question 5

Explain how forces of a falling object change during its fall

Answer 5

Air resistance increases with speed so just after jumping the air resistance is much smaller than her weight . The large resultant force makes her accelerate downwards .

It’s air resistance is larger but her weight stays the same . The resultant force is smaller so it is still accelerating but not as much .

It is moving so fast that the air resistance balances its weight . It continues to fall at the same speed . This is terminal velocity