A sanding disk with rotational inertia 9.0x 103 kg-m is attached to an electric drill whose motor delivers a torque of magnitude 43 N-m about the central axis of the disk. About that axis and with torque applied for 52 ms, what is the magnitude of the (a) angular momentum and (b) angular velocity of the disk? a) numbers (?) Units (?) b) numbers (?) Units(?) 2) A wheel starts from rest and has an angular acceleration that is given by a (t)-6 rad/s) The angle through which it turns in time t is given by: a) ((1/8)trad/s⁴ b) ([1/4]r" rad/s⁴
Angular Momentum
The momentum of an object is given by multiplying its mass and velocity. Momentum is a property of any object that moves with mass. The only difference between angular momentum and linear momentum is that angular momentum deals with moving or spinning objects. A moving particle's linear momentum can be thought of as a measure of its linear motion. The force is proportional to the rate of change of linear momentum. Angular momentum is always directly proportional to mass. In rotational motion, the concept of angular momentum is often used. Since it is a conserved quantity—the total angular momentum of a closed system remains constant—it is a significant quantity in physics. To understand the concept of angular momentum first we need to understand a rigid body and its movement, a position vector that is used to specify the position of particles in space. A rigid body possesses motion it may be linear or rotational. Rotational motion plays important role in angular momentum.
Moment of a Force
The idea of moments is an important concept in physics. It arises from the fact that distance often plays an important part in the interaction of, or in determining the impact of forces on bodies. Moments are often described by their order [first, second, or higher order] based on the power to which the distance has to be raised to understand the phenomenon. Of particular note are the second-order moment of mass (Moment of Inertia) and moments of force.
Please solve all i know Bartelby rules but solve all questions.
Qno1 . A sanding disk with rotational inertia 9.0x 103 kg-m is attached to an electric drill whose motor delivers a torque of magnitude 43 N-m about the central axis of the disk. About that axis and with torque applied for 52 ms, what is the magnitude of the (a)
a) numbers (?) Units (?)
b) numbers (?) Units(?)
2) A wheel starts from rest and has an
a) ((1/8)trad/s⁴
b) ([1/4]r" rad/s⁴
c) ((1/2)trad/s⁴
d) ((t") rad/s²
c) 12rad
3) A disk, initially rotating at 144 rad/s, is slowed down with a constant angular acceleration of magnitude 3.75 rad/s². (a) How much time does the disk take to stop? (b) Through what angle (rad) does the disk rotate during that time?
a) numbers(?) Units(?)
b) numbers (?) Unjts(?)
4) Ameter stick balances horizontally on a knife- edge at the 50.0 cm mark. With two 6.01 g coins stacked over the 25.6 cm mark, the stick is found to balance at the 36.9 cm mark. What is the mass of the meter stick?
a) numbers(?) Units(?)
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