Answer:
The equation which define the work done by spring is w = 45 x³ - 8 x²
Explanation:
Given as :
The force is the function of distance x
I.e F(x) = a x² - b x
where
a = 45 N/m²
b = 8 N/m
Now, Wok done = Force ×displacement
I.e W = F . ds
So , W = (a x² - b x) × x
or, W = (45 x² - 8 x) × x
Or, w = 45 x³ - 8 x²
So, the equation which define the work done by spring is w = 45 x³ - 8 x²
Hence The equation which define the work done by spring is w = 45 x³ - 8 x² Answer
A
Explanation:
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Answer:
Given:
Initial speed (u) = 0 km/hr = 0 m/s
Final speed (v) = 36 km/hr
Time taken (t) = 10 sec
To Find:
Acceleration (a) of the train
Explanation:
So,
Final speed (v) = 10 m/s
Acceleration of train = 1 m/s²
I’m thinking B.. or it could be C