6. Fig. 3.1 shows a pond that is kept at a conslant depth by a pressure-operated valve in the base.
water
pressure oporated
va
outlet
spring
Fig. 3.1
(a) The pond is kept at a depth of 2.0m. The density of water is 1000 kam
Calculate the water pressure on the valve.
A. 20 Pa
B.
20000 Pa
o 10000 Pa
D. 100 Pa​

I didnt understand it sorrryr

Explanation:

graphing motion: mastery test

209be

what is the instantaneous acceleration of

the particle at point b?

0 meters/second?

10 meters/second?

12 meters/second?

velocity imetersisecond

15 meters/second?

20

time (seconds)

answer: 0 meters/second^2

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