a wheel has a constant angular acceleration of 3.0 rad/s2. during a certain 4.0s interval it turns through an angle of 120 rad. assuming that the wheel started from rest, how long has it been in motion at the start of this 4 s interval

8 s

Explanation:

We are given that

Acceleration=

Time, t=4 s

Angle,

Initial angular velocity,

Let be the velocity at the start of this 4 s interval

We know that

Using the formula

t=8 s

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .

answer: he got 23

explanation: