If you exert a force of 700 N to walk 6 m up a flight of stairs in 10 s, how much power do you use

The focal length of a relaxed human eye is approximately 1.7 cm. when we focus our eyes on a close up object, we can change the refractive power of the eye by about 16 diopters. (a) does the refractive power of our eyes increase or decrease by 16 diopters when we focus closely? explain. (b) calculate the focal length of the eye when we focus closely.

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

While the change in blank will remain the same during a collision, the force needed to bring an object to a stop can be blank if the time if collision is blank