Which question about dinosaurs is a scientific question?
1. should scientists try to clone dinosaurs from dna remains?
2. is the skeletal structure of a tyrannosaurus or brontosaurus more interesting?
3. how big was the average velociraptor?
4. why do people believe that dinosaurs existed?

The right answer is Why do people believe that dinosaurs existed?

Science is the study of observations and experiments. We use science to find out the logic behind any query. There must be a query of an unknown nature and science must be able to give its answer. We do believe that dinosaurs existed but we dont know how is this statement correct so science proved it and it provided us with reasons on the basis of experiences.

the answer is to check all of them! they all apply well at least i think so!

what was the acceleration of the 2 kg cart?

⇒ 16.0 cm/s2

what was the acceleration of the 4 kg cart?

⇒ 8.1 cm/s2

what was the acceleration of the 6 kg cart?

⇒ 5.3 cm/s2