Determine the image distance and image height for a 5 cm of the tall object placed 20 cm from a concave mirror having a focal length of 15cm

An object thrown vertically upward from the surface of a celestial body at a velocity of 36 m/s reaches a height of sequalsminus0.9tsquaredplus36t meters in t seconds. a. determine the velocity v of the object after t seconds. b. when does the object reach its highest point? c. what is the height of the object at the highest point? d. when does the object strike the ground? e. with what velocity does the object strike the ground? f. on what intervals is the speed increasing?

Determine the amount of work done when a crane lifts a 100-n block form 2m above the ground to 6m above the ground

Suppose you increase your walking speed from 7 m/s to 13 m/s in a period of 2 s. what is your acceleration?