stretching or drawing a solid into a wire is which of the following physical properties A)ductility B)solubility C)malleability
2 answers:
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Answer:
(a), The SSD will be 723.9 ft.
(b-1), The SSD will be 620.2 ft.
(b-2), The SSD will be
(c), The SSD will be 910.5 ft.
Explanation:
Given that,
Speed = 70 mph
Suppose, a perception reaction time of 2.5 sec and the coefficient of friction is 0.35
We need to calculate the stopping sight distance
Using formula of SSD
Where, v = speed of vehicle
t = perception reaction time
f = coefficient of friction
g = gradient of road
(a). If the gradient of road is zero.
Then, the stopping sight distance will be
(b-1). If the gradient of road is 0.1
Then, the stopping sight distance will be
(b-2). If the grade continuously decrease then the SSD will be increase.
But if the grade is increase then the SSD will be decrease and for flat grade the SSD will be more.
So, The SSD will be
(c). When the vehicle is traveling downhill on a roadway of constant grade then the vehicle take will be more SSD
So, The SSD will be
Hence, (a), The SSD will be 723.9 ft.
(b-1), The SSD will be 620.2 ft.
(b-2), The SSD will be
(c), The SSD will be 910.5 ft.
Answer:
562 miles per hour.
Explanation:
As given in the question, the formula for the maximum speed on a curved road is
Given value of feet
So the maximum safe speed will be
miles per hour.
Rounding off to the nearest whole number we get the maximum safe speed at the curved road is 562 miles per hour.
Answer:
The minimum speed required is 2.62m/s
Explanation:
The value of gravitational acceleration = g = 9.81 m/s^2
Radius of the vertical circle = R = 0.7 m
Given the mass of the pail of water = m
The speed at the highest point of the circle = V
The centripetal force will be needed must be more than the weight of the pail of water in order to not spill water.
Below is the calculation: