Question

In: Physics

3. The angle that a wheel rotates as a function of time "t" is given by...

3. The angle that a wheel rotates as a function of time "t" is given by θ (t) = 8.5–15.0t ^ 2 + 1.6t ^ 4 where θ is in radians and "t" in seconds. (a) Determine an expression for the instantaneous angular velocity ω. (b) Determine an expression for the instantaneous angular acceleration α. (c) Evaluate ω and α at t = 3.0s. (d) What is the average angular velocity at t = 2.0s and t = 3.0s? (e) What is the average angular acceleration at t = 2.0 s and t = 3.0 s?

Solutions

Expert Solution

(3)  The angle that a wheel rotates as a function of time "t" is given by

(A) Determine an expression for the instantaneous angular velocity ω;

(B) Determine an expression for the instantaneous angular acceleration α

(C) Evaluate ω and α at t = 3.0s;

from equation (1);

(D) What is the average angular velocity at t = 2.0s and t = 3.0s ?

average angular velocity = change in angular position / change in time;

at t = 3s;

at t = 2s;

(E) average angular acceleration at t = 2.0 s and t = 3.0 s

at t = 3s;

at t = 2s;


Related Solutions

The angle through which a rotating wheel has turned in time t is given by θ...
The angle through which a rotating wheel has turned in time t is given by θ = a t− b t2+ c t4, where θ is in radians and t in seconds PART A If a = 9.0 rad/s , b = 15.5 rad/s2 , c = 1.6 rad/s4 , evaluate ω at t = 3.2 s . Express your answer using two significant figures PART B Evaluate α at t = 3.2 s . Express your answer using two...
During 0.24 s, a wheel rotates through an angle of 2.42 rad as a point on...
During 0.24 s, a wheel rotates through an angle of 2.42 rad as a point on the periphery of the wheel moves with a constant speed of 2.48 m/s. What is the radius of the wheel?
Consider the vector function given below. r(t) = 2t, 3 cos(t), 3 sin(t) (a) Find the...
Consider the vector function given below. r(t) = 2t, 3 cos(t), 3 sin(t) (a) Find the unit tangent and unit normal vectors T(t) and N(t). T(t)   =    N(t)   =    (b) Use this formula to find the curvature. κ(t) =
A rod AB with A at the origin rotates such that the angle between the rod...
A rod AB with A at the origin rotates such that the angle between the rod and the x?axis is theta = pi (8t
A bulldozer’s velocity (in m/s) at a time t is given by v(t)=t^2-t+3. (a)Estimate the displacement...
A bulldozer’s velocity (in m/s) at a time t is given by v(t)=t^2-t+3. (a)Estimate the displacement of the bulldozer on the time interval using 0≤t≤5 Midpoint Riemann Sum with 10 subintervals. Specify the value of,n ,Δx, and the chosen sample points. (b)Find the exact displacement of the object on the time interval 0≤t≤5 using the limit definition of the definite integral. Thank you,
1. The angle of an airplane propeller makes with the horizontal as a function of time...
1. The angle of an airplane propeller makes with the horizontal as a function of time is given by θ=(125rad/s)t+(42.5rad/s^2)t^2. estimate the instantaneous angular velocity at t=0.00s by calculating the average angular velocity from t=0.00s to t=0.010s A. Estimate the angular speed at t = 0 by calculating the average angular speed between ti = 0 and tf = 0s. B. Estimate the angular speed at t = 1.00 by calculating the average angular speed between ti = 1.00 and...
A wheel rotates with a constant angular acceleration of 3.0 rad/. If the angular speed of...
A wheel rotates with a constant angular acceleration of 3.0 rad/. If the angular speed of the wheel is 2 rad/s at t = 0, through what angular displacement does the wheel rotate in 2 s? 10 rad. 6 rad. 15 rad. 4 rad. 12 rad. Based on question number 3, through how many revolutions has the wheel turned during this time interval?   4 rev. 3 rev. 1.6 rev. 5 rev. 2 rev. Based on question number 3, what is...
A wheel 1.70 m in diameter lies in a vertical plane and rotates with a constant...
A wheel 1.70 m in diameter lies in a vertical plane and rotates with a constant angular acceleration of 4.10 rad/s2. The wheel starts at rest at t = 0, and the radius vector of a certain point P on the rim makes an angle of 57.3° with the horizontal at this time. At t = 2.00 s find the following. (a) the angular speed of the wheel=______ rad/s (b) the tangential speed and the total acceleration of the point...
A vertical wheel with a diameter of 39 cm starts from rest and rotates with a...
A vertical wheel with a diameter of 39 cm starts from rest and rotates with a constant angular acceleration of 7.2 rad/s2 around a fixed axis through its center counterclockwise. a) Through what angle (in degrees) has the point initially at the bottom of the wheel traveled when t = 14 s? (Indicate the direction with the sign of your answer.) b) What is the point's total linear acceleration at this instant? (Enter the magnitude in m/s2.
3. A 1.50kg mass on a spring has a displacement as a function of time given...
3. A 1.50kg mass on a spring has a displacement as a function of time given by the     equation: x(t) = (7.40cm)cos[(4.16s-1)t – 2.42].      Find, = the force constant of the spring; the maximum speed of the mass; the maximum force on the mass; at t= 1.00s, find the mass’s the position, the speed, the acceleration the force on the mass
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT