Say you want to know the change in kinetic energy of a ball. you measure its mass, m, its intial velocity, v1, its final velocity, v2, and uncertainties on all of these values: om, op, and ou, respectively. the formula for the change in kinetic energy, ak, is given by ak = m(uz - ví). (a) first write oak in terms of įm, 01/2m, (vź – ví), and 0(13- (b) write 01/2m in terms of om (this should be very easy). (c) write (3-w) in terms of uź - ví), ví, vž, ? , and 0. (d) now write oz in terms of vi and ovi. (e) write uz in terms of v2 and 02 (you should be able to write this down without thinking based on your previous answer). (f) now put all your answers together and express oak in terms of m, 01, 02, 0m, oui, and ouz.

the moon affects the earth gravitation ally, causing certain motions of that body and also producing tides in its ocean and atmosphere. the tidal wave in our atmosphere is, however, far too minute to be an effective cause in any known meteorological phenomenon.

explanation:

wire in brush may conduct electricity from cell to drill and vice versa electrc shock possible

the minimum constant speed at which she can catch the train is 2.7 m/s

given:

acceleration = 0.6

time = 4.5 s

to find:

velocity = ?

formula used:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

solution:

from 1st kinematic equation we get,

v = u + at

u = initial speed of train = 0 m/s

v = final speed of the train

a = acceleration of the train

t = time

v = 0 + (0.6 × 4.5)

v = 2.7 m/s

the minimum constant speed at which she can catch the train is 2.7 m/s