Recent content by shadowice

what exactly do you mean by expand sin(w*0.1 +δ) that's where i got lost last time

Homework Statement A simple harmonic oscillator has a frequency of 3.4 Hz. It is oscillating along x, where x(t) = A cos(ωt + δ). You are given the velocity at two moments: v(t=0) = 1.8 cm/s and v(t=.1) = -19.3 cm/s. 1)Calculate A. 2)Calculate δ. Homework Equations w= 2pi*f = 21.36 rad/s...

ya the original eq had it as the very first term it was 17cm

Homework Statement A 18.0-kg block oscillates back and forth along a straight line on a frictionless horizontal surface. Its displacement from the origin is given by x(t) = (17.0 cm) cos[( 22.0 rad/s) t + π rad] What is the magnitude of x(t) when the block experiences its maximum...

so your saying to change this (GmM)/R^2 = Rw^2 to (GmM)/R^3 =w^2 to solve for a number which would be m = Mr^3*(2pi/T)^2 and set that to be the top and (4/3) pi R^3 to be the bottom and cancel out the r's and substitute numbers in. But where do i get rid of the M i see no way to...

Homework Statement A satellite is in a circular orbit very close to the surface of a spherical planet. The period of the orbit is 2.50 hours. What is density of the planet? Assume that the planet has a constant density. R= radius G= gravational constant = 6.6742x10^-11 M = mass of m =...

Homework Statement The system in the Figure is in equilibrium. A mass M1 = 230.0 kg hangs from the end of a uniform strut which is held at an angle θ = 48.0° with respect to the horizontal. The cable supporting the strut is at angle α = 29.7° with respect to the horizontal. The strut has a...

Homework Statement Compact discs and long-playing records are made from similar materials. The former have a diameter of about 12 cm, and the latter, about 32 cm. When in use, records spin at 33.333 rev/min, and compact discs spin at, say, 405 rev/min. Ignoring the holes in both objects and...

thnx don't know why i didnt double check that i almost always do

Homework Statement A pulsar is a rapidly rotating neutron star that emits radio pulses with precise synchronization, there being one such pulse for each rotation of the star. The period T of rotation is found by measuring the time between pulses. At present, the pulsar in the central region of...

Homework Statement A uniform 3.8-kg cylinder can rotate about an axis through its center at O. The forces applied are: F1 = 4.6 N, F2 = 6.2 N, F3 = 8.0 N, and F4 = 3.1 N. Also, R1 = 10.7 cm and R3 = 5.8 cm. Find the magnitude and direction (+: counterclockwise; -: clockwise) of the angular...

figured out my error can delete this topic or close whichever you do

thnx i put in wrong mass for bullet was the problem got it now was .01016

that didnt work but where are you getting the .1 when i do what you typed out i get (.024+2.61)*.884 = 2.61*48.5+2.61*Vb 2.328456 = 126.585 + 2.61*VB -124.26 = 2.61*vb 47.6 m/s = vb plugging that # in for v i get no where near .1, so you could be close but it wanted atleast 4 sig digits...

ok so would i do 1/2mvi^2 = 1/2 mVm2^2 vm2= velocity of block just after bullet passes threw 1/2*.024*97^2= 1/2*2.61*vm2^2 vm2 = 9.3016 1/2mvm2^2= mgh 1/2*9.3016^2 = 9.8h (m's cancel out) i got h = 4.414 m but tells me that's wrong