Acceleration i believe is the answer
Answer:
- 1.42m/s²
Explanation:
Acceleration is defined as the change in velocity of a body with respect to time.
Acceleration = change in velocity/time
Change in velocity = final velocity - initial velocity
Acceleration = final velocity - initial velocity/time
Since she slows her car from 14.0 to 5.5m/s in 6seconds,
Initial velocity = 14m/s
Final velocity = 5.5m/s
Time = 6seconds
Substituting in the given formula, we will have
Acceleration = 5.5 - 14/6
Acceleration = - 8.5/6
Acceleration = - 1.42m/s²
The negative acceleration shows that the car decelerates.
Answer:
they are the same
Explanation:
change in speed is 10km/h for both, and the time is the same for both. they have the same acceleration.
B they start moving around and stop staying in an orderly manner
Answer:
Distance, d = 0.049 meters
Explanation:
It is given that,
Mass of the pile, m = 2500 kg
It is dropped through a height of 8.0 m on each stroke, h = 8 m
The resisting force of the ground, ![F=4\times 10^6\ N](https://tex.z-dn.net/?f=F%3D4%5Ctimes%2010%5E6%5C%20N)
The work done in each stroke is equal to the potential energy of the pile driver such that,
![W=mgh](https://tex.z-dn.net/?f=W%3Dmgh)
Work done due to resistive force is :
![W=Fd](https://tex.z-dn.net/?f=W%3DFd)
So,
![Fd=mgh](https://tex.z-dn.net/?f=Fd%3Dmgh)
d is the distance covered by the post driven in on each stroke.
d = 0.049 meters
So, on each stroke the post driven is 0.049 meters far. Hence, this is the required solution.