Abar on a hinge starts from rest and rotates with an angular acceleration α = (10 + 6t), where α is in rad/s2 and t is in seconds. determine the angle in radians through which the bar turns in the first 4.00 s.

Explanation:

As we know that angular acceleration is defined as rate of change in angular velocity

so here we can write

Now we will have

here initial angular speed is ZERO as it start from rest

now we can say that rate of change in angular position is known as angular velocity

So here we will have

v=ir = 3x15 =45 v

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explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."