Answer:
W= 20000j
Explanation:
W= fd = 1000N(20m) = 20000j
In this question, due importance should be given to all the information's that are provided in the question. Based on those information's the answer to the question can be easily deduced. Let us first write down all the provided information's.
Initial Velocity (V1) = 0 m/s
Final Velocity (V2) = 5 m/s
Initial time (T1) = 0 sec
Final Time (T2) = 4 sec
Then
Average acceleration of the car = (V2 -V1)/(T2 - T1)
= (5 - 0)/(4 - 0) m/s^2
= 5/4 m/s^2
1.25 m/s^2
So the average acceleration of the car over this period of time is 1.25 m/s^2. I hope the process is clear for you to understand.
Answer:
c. a wage-price spiral of ever-increasing prices.
Explanation:
The wage-price spiral is a type of economic assertion that explains the cause and effect of wage hike in an economy.
Wage-price spiral tells that increase in wage will lead to more disposable income i.e. individuals have more money to spend and as such, increase in demand for good and services which in turn leads to an increase in price of goods and services.
This explains the spiral relationship, increase in wages means increase in income which leads to increase in demand and this leads to increase in price of goods and services and employers will in turn demand for increase in wages and the cycle continues.
Answer:
Sound travels faster in steel because it is denser than wood.
Explanation:
Because the molecules in steel are more compact that means it takes less time for vibrations to travel from one molecule to the next.
