If kenny lifts a box that weighs 6.4 kg, how many grams is he lifting?

M = 6400 grams

Explanation:

As we know that the mass of the box will be given as

now we know that

now we have to find the mass of the box in grams so we can use the conversion

now we have

so it is 6400 grams

at right angles to each other

t = 1/400 h   ⇔ 0.0025 h ⇔ 9s ⇔ 0.15 m

any of the answers are correct.