Recent content by questtosuccess

Show that the kinetic energy of the Earth after a collision can be ignored (stuck & desperately need help)? A ball of mass m2 is dropped and bounces off the floor. If the impact is viewed as an elastic collision between the ball and the earth, show that the kinetic energy of the Earth after the...

Thank you to everyone who responded !

So would the equation for part b) be: E1+Wnc= E2 1/2kx^2 + Ffdcos180 = mgy 1/2kx^2 - μFnd = mg(dsin28) 1/2kx^2= d(mgsin28) + μmgcos28 d 1/2kx^2 = d(mgsin28 + μmgcos28) d= 1/2kx^2/ mg(sin28+μcos28) d= 1.75 m Correct me please; glad to be apart of this forum :)

yeaah, i definitely over complicated things. i figured out how to solve for part a). for part b), do I calculate the non-conservative force (Wnc= Ffdcos180) from the bottom or the top of the incline? How do you know? E1 + Wnc= E2 or E1= E2+ Wnc <-- this makes most sense for me right now ...

** sorry, forgot to include the angle; the angle of the incline is 28 degrees.

Homework Statement A block of mass 2.5 kg is placed against a compressed spring (k = 2900 N/m) at the bottom of an inclined plane. When the spring is released the block is projected up the incline and the spring expands by 14 cm to its normal length. Calculate the maximum distance traveled by...

Nope, no answer. But I got 282.1 J... so I'm assuming there was just an error in the rounding off throughout calculations. Thanks for the reply ! :)

I just got it :D ! Thank you so much ! it's just trig ratios, so d= 3/sin35 Your help was much appreciated !

Do you mean I should just set the equation as E1= E2 + Wnon-conservative = E3 ?? The slope is 35 degrees... and the change in height is 3m right? Because the top is 3m and the bottom is 0m ... ?

Thank you, I'm glad to be apart of this forum :) I found the velocity of the box on the incline (v2) because I needed to plug it into find the energy of the box at situation 3 (where it's traveling along the ground at 0 m). How else would I be able to solve if I hadn't done that?? The...

Homework Statement A 15 kg block slides along a horizontal frictionless surface 3.0 m above the ground at a constant speed of 2.0 m/s. The block then slides down an incline that makes an angle of 35° with the horizontal and has a coefficient of kinetic friction equal to 0.30. After reaching...