Kenny and Chris are walking down the road. They walk a distance of 250meters in 50 seconds. What was their average speed? (remember to choose the correct units!)

Can anybody me with this? ? (picture included.)

What properties of a moving object are used in determining the object's energy of motion

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.