To separate a mixture of salt and water, you can try first by using filter paper hen with the extra water part set it out to the window so that the salt water evaporates and only the salt is remaining.
The intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.
1) 1.08 m/s^2
Explanation:
Acceleration is equal to the change in velocity divided by the time taken:

where
v is the final velocity
u is the initial velocity
is the time taken
In this problem, we have:
- initial velocity: u = 0 (you start from rest)
- final velocity: v = 5.4 m/s
- time taken: 
Therefore, the acceleration is

2) -0.54 m/s^2
We can calculate the acceleration to slow down using the same formula as before, but this time the data are as follows:
- initial velocity : u = 5.4 m/s
- final velocity : v = 0 (you come to a stop)
- time taken : 
using the same formula, we find

And the negative sign means it is a deceleration.
To solve this problem it is necessary to apply the concepts related to the kinetic energy expressed in terms of simple harmonic movement, as well as the concepts related to angular velocity and acceleration and linear acceleration and velocity.
By definition we know that the angular velocity of a body can be described as a function of mass and spring constant as

Where,
k = Spring constant
m = mass
From the given values the angular velocity would be


The kinetic energy on its part is expressed as

Where,
A = Amplitude
= Angular Velocity

PART A) Replacing previously given values the energy in the system would be



PART B) Through the amplitude and angular velocity it is possible to know the linear velocity by means of the relation



PART C) Finally, the relationship between linear acceleration and angular velocity is subject to


