Answer:
Speaking to witnesses is a job they do. If anyone stops after seeing the accident occur, the officers who respond to the accident take their personal information, they get their contact information, and they add their statements to their report.
Explanation:
Answer:
The minimum speed of the box bottom of the incline so that it will reach the skier is 8.19 m/s.
Explanation:
It is given that,
Mass of the box, m = 2.2 kg
The box is inclined at an angle of 30 degrees
Vertical distance, d = 3.1 m
The coefficient of friction, 
Using the work energy theorem, the loss of kinetic energy is equal to the sum of gain in potential energy and the work done against friction.


W is the work done by the friction.







v = 8.19 m/s
So, the speed of the box is 8.19 m/s. Hence, this is the required solution.
Answer:
The kinetic energy is 
Explanation:
From the question we are told that
The potential difference is 
The potential energy of the end is mathematically represented as

q is the charge on an electron with a constant value of 
substituting values


Now from the law of energy conservation
The 
Where
is the potential energy at the end
So

The negative sign is not includes because kinetic energy can not be negative
Answer:
v= 14.22 m/s
Explanation:
Given that
u = 12.1 m/s
a=0.35 m/s².
t= 6.07 s
We know v = u +at
v=final velocity
u=initial velocity
t=time
a=acceleration
Now by putting the values in the above equation
v= 12.1 + 0.35 x 6.07 m/s
v= 14.22 m/s
Therefore the final velocity will be 14.22 m/s.