Engineers tasked with building a car bumper need high-quality plastic that is readily available. they have found the material polycarbonate, which is long-lasting and not too costly.

which technological design criteria have they already met?
more than one answer!

be available

be affordable

be durable

solve the problem

not cause harm to others

It's a snowy day and you're pulling a friend along a level road on a sled. you've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. you've been walking at a steady 1.5m/s, and the rope pulls up on the sled at a 32 ∘ angle. you estimate that the mass of the sled, with your friend on it, is 65 kg and that you're pulling with a force of 80 n .