jackfrost5
25.12.2019 •
Physics
The rotating arm starts from rest and acquires a rotational speed n = 600 rev/min in 2 seconds with constant angular acceleration. find the time t after starting before the acceleration vector of end p makes an angle of 45 with the arm op
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Ответ:
The time after starting is 0.178 sec.
Explanation:
Given that,
Rotational speed = 600 rev/min
Time t = 2 sec
Angle = 45
Distance OP= 6''
According to figure,
We need to calculate the angular acceleration
Using formula of angular acceleration
Put the value into the formula
We need to calculate the tangential acceleration
Using formula of tangential acceleration
Put the value into the formula
We need to calculate the normal acceleration
Using formula of normal acceleration
For angle
Put the value into the formula
We need to calculate the time
Using the kinematics equation
Put the value into the formula
Hence, The time after starting is 0.178 sec.
Ответ:
Explanation:
Why sir