Question

DIAGRAM BELOW
1.Considering the block/spring setup of the previous problem, what will the kinetic energy of the block be at the instant the left end of the spring is at x = 0. Consider the mass of the block to be 4.00 kg.

2.Considering the block/spring setup of the previous problem, what will the velocity of the block be the instant the left end of the spring is at x = 0?

Answer 1

FRIctionless

Answer 2

Kinetic energy K.E=(1/2)*k*x^2

Answer 3

so no velocity?

Answer 4

Ya no velocity

Answer 5

We need to work to compress x
W=(1/2)*k*x^2

Answer 6

what do i plug in for k though?

Answer 7

I think k will b given

Answer 8

K=spring constant

Answer 9

U should check ur math once again for the value of k

Answer 10

oh it gave me k=5, sorry

Answer 11

so I dont use the 4kg? and how do i find velocity?

Answer 12

Sorry, we can write
mg=kx
k=mg/x

Answer 13

If u dont understand hw mg=kx, then i wanna explain iy

Answer 14

I think u r now able to calculate the value of k.
Right?

Answer 15

i do understand! I was given k= 5 though, and also x=3, from a previous question. So I can plug in values to find Kinetic energy K.E=(1/2)*k*x^2. Then I can use Kinetic energy K.E=(1/2)*m*v^2 to find velocity!

Answer 16

I actually just got the right answers for both! Thanks so much for always helping me! :)

Answer 17

U r most welcome!

Answer 18

Nd i m realy glad to read ur testimonial!