If a wheel turns with a costant rotational speed then: each point on its rim moves with constant roational velocity, each point on its rim moves with constant translational acceleration, the wheel turns with constant translation acceleration, the wheel turns through equal angles in equal times, the angle through which the wheel turns in each second increases as time goes on, the angle through which the wheel turns in each second decreases as time goes on.
I thought if the wheel turns with a constant translational velocity along the rim because of the the equation v=wr. Am I right to think since along the rim will have the same radius as in a wheel.
the angle through which the wheel turns in each second increases as time goes on, the angle through which the wheel turns in each second decreases as time goes on.
This makes no sense to me.
Rim is an ill defined term. IN some instances, the rim is the steel part, the radius includes that and the depth of the rubber tire. But Rim can have other meanings.
If a wheel turns with a constant rotational speed, it means that the wheel is rotating at a fixed rate. Let's analyze the given statements one by one:
1. Each point on its rim moves with constant rotational velocity: Yes, this statement is correct. When a wheel turns with a constant rotational speed, each point on its rim moves with a constant rotational velocity. This velocity comes from the equation v = ωr, where v is the linear velocity at a point on the rim, ω is the angular velocity (rotational speed), and r is the radius of the wheel.
2. Each point on its rim moves with constant translational acceleration: No, this statement is not correct. The translational acceleration refers to the change in linear velocity, not rotational velocity. In this case, since the wheel is turning with a constant rotational speed, there is no change in linear velocity, and therefore, there is no translational acceleration.
3. The wheel turns with constant translational acceleration: No, this statement is also not correct. Similar to the previous statement, translational acceleration refers to linear motion, and a wheel turning with a constant rotational speed does not involve any translational acceleration.
4. The wheel turns through equal angles in equal times: Yes, this statement is correct. When a wheel turns with a constant rotational speed, it means that it rotates at a fixed rate. As a result, it will turn through equal angles in equal amounts of time. This is a fundamental property of objects rotating at a constant speed.
5. The angle through which the wheel turns in each second increases as time goes on: No, this statement is not correct. Since the wheel is turning at a constant rotational speed, the angle through which it turns in each second remains constant over time. There is no increase or decrease in the angle as time progresses.
6. The angle through which the wheel turns in each second decreases as time goes on: No, this statement is also not correct. As explained above, the angle through which the wheel turns in each second remains constant when it rotates at a constant speed. There is no decrease in the angle as time goes on.
Regarding your comment on the term "rim," you are correct that it can have different meanings depending on the context. In the case of this question, the "rim" refers to the outer edge of the wheel, where the circumference of the wheel is located.