Kai was 200 meters north of the library when he remembered he had to return some books to the library. it took him 200 seconds to do the round trip. which best describes kai's roundtrip? his speed was 1 m/s, and his velocity was 0. his speed was 2 m/s, and his velocity was 0. his speed was 1 m/s, and his velocity was 1 m/s north. his speed was 2 m/s, and his velocity was 2 m/s south.

the answer is B

The correct option is 'his speed was 2 m/s, and his velocity was 0.'

Explanation:

In a Round trip the stating point and finishing point are the same.

The distance covered by Kai in 200 seconds = AB+BA =

200 m+200 m = 400 m

Speed of the kai =

Displacement = shortest path covered = AB - BA = 200 m - 200 m =0 m

Velocity of the kai =

Hence, the correct option is 'his speed was 2 m/s, and his velocity was 0.'

the answer is false. this is because for ice to melt, it requires latent heat of melting. latent heat means heat energy required to change phase without any increase in temperatures. therefore, the ice will take energy from the environment to melt hence atmospheric temperatures will reduce.

490 n

f=125n a=2.5m/s2