Recent content by mkwok

A simple pendulum, consists of an object suspended by a string. The object is assumed to be a particle. The string, with its top end fixed, has negligible mass and does not stretch. In the absence of air friction, the system oscillates by swinging back and forth in a vertical plane. If the...

1.75/2 because it started at rest where Vi=0, and vf=1.75 so the average would be 1.75/2

First of all, I know I've posted this already, but I didn't really understand the reply. I tried going back to the thread, but I can't find it anymore. Homework Statement A 750 kg elevator starts from rest. It moves upward for 3.00 s with constant acceleration until it reaches its cruising...

Homework Statement A 4.00 kg steel ball is dropped onto a copper plate from a height of 10.0 m. If the ball leaves a dent 2.75 mm deep, what is the average force exerted by the plate on the ball during the impact? Homework Equations KE=1/2mv^2 F=ma Wgrav=mgh The Attempt at a...

u need set up the equations into two parts x, y the x component of this pendulum would be Fx = ma = Tx-mr^2/R = 0 where Tx is your x-component of the tension the sum of the horizontal forces must equal to zero in order for the ball to move in the circle Fy = ma = Ty-mg = 0 the sum of the...

I guess F is just the tension? therefore F = 7568.75N will v be the final velocity or the average velocity?

Homework Statement A 750 kg elevator starts from rest. It moves upward for 3.00 s with constant acceleration until it reaches its cruising speed, 1.75 m/s. (a) What is the average power of the elevator motor during this period?(b) How does this power compare with the motor power when the...

the problem was given that way, we are trying to find the relationship between X and y

Homework Statement 0<y0<x0 x1=(x0+y0)/2 y1=\sqrt{x0y0} in general Xn+1=(xn+yn)/2 Yn+1=\sqrt{XnYn} Homework Equations none The Attempt at a Solution I have no idea I tried to solve for Xn and substituting that into another equation... however, I don't know how to simplify...

I am not sure how that relates to Taylor's Series?

Homework Statement Determine the Taylor Series for f(x)=sinx about the center point c=pi/6Homework Equations pn(x) = f(c) + f'(c)(x-c) + f''(c)(x-c)^2/2! + f'''(c)(x-c)^3/3! + ...The Attempt at a Solution f(pi/6) = 1/2 f'(pi/6) = \sqrt{3}/2 f''(pi/6) = -1/2 f'''(pi/6) = -\sqrt{3}/2 f(4)(pi/6)...

oops. I am so sorry I really meant the dot product... the angle is still incorrect though

Homework Statement A force F = (5 i - 1 j) N acts on a particle that undergoes a displacement r = (2 i + j) m. (a) Find the work done by the force on the particle. (Calculate all numerical answers to three significant figures.) (b) What is the angle between F and r? * the problem required us...

well, so how would I approach this question with v^2? I know for sure that I got the answer incorrect because I typed it into my online homework applet, it came out to be wrong.

Homework Statement A space station, in the form of a wheel 135 m in diameter, rotates to provide an "artificial gravity" of 3.80 m/s^{2} for persons who walk around on the inner wall of the outer rim. Find the rate of rotation of the wheel (in revolutions per minute) that will produce this...