HobieDude16
Oct13-04, 08:42 PM
I got parts a and b but am having trouble getting part c and d. can someone please help me? thanks in advance!
Figure 8-40 shows an 8.00 kg stone resting on a spring. The spring is compressed 8.0 cm by the stone.
Fig. 8-40
(a) What is the spring constant?
9.8 N/cm by mg/x(compression)
(b) The stone is pushed down an additional 30.0 cm and released. What is the elastic potential energy of the compressed spring just before that release?
70.8 J by convert A to N/m then convert compression to m and then use .5kx^2 to get the answer
(c) What is the change in the gravitational potential energy of the stone-Earth system when the stone moves from the release point to its maximum height?
J gravitational potential energy is mgy but i don't know y
(d) What is that maximum height, measured from the release point?
m y=(.5mv^2)/mg I know i have to use this eqn. but i don't know v.
Figure 8-40 shows an 8.00 kg stone resting on a spring. The spring is compressed 8.0 cm by the stone.
Fig. 8-40
(a) What is the spring constant?
9.8 N/cm by mg/x(compression)
(b) The stone is pushed down an additional 30.0 cm and released. What is the elastic potential energy of the compressed spring just before that release?
70.8 J by convert A to N/m then convert compression to m and then use .5kx^2 to get the answer
(c) What is the change in the gravitational potential energy of the stone-Earth system when the stone moves from the release point to its maximum height?
J gravitational potential energy is mgy but i don't know y
(d) What is that maximum height, measured from the release point?
m y=(.5mv^2)/mg I know i have to use this eqn. but i don't know v.