Aboy with a mass of 60 kg climbs 10 m
vertically up a ladder.
a) what is his weight?
b) how much work is done?
c) what are the energy changes here?

Which statements describe the relationship between science and society? check all that apply. science is influenced by the needs of society. science and society are independent. science seeks ways to meet the needs of society. scientists find new ways to address societal concerns. scientists improve existing products.

Molten iron fills a mould, which has a volume of 200 cm cubed. calculate the volume when the iron cools and solidifies.

An object in mechanical equilibrium is an object