Conservation of energy A spring is attached to a pivot whose height above the top of the block is h = 0.40 m The spring constant is k = 800 N/m The spring's unstretched length = Lo= 0.30 m The block is initially at rest with the spring at angle = 0 = 45 degrees relative to the vertical. When the block is released, the spring will pull it to the right. The mass of the block is m = 4 kg The block slides on a greased surface, so there is no friction. (al, (a2 Calculate L₁ = the initial length of the spring as shown in the figure. L₁ = Calculate s₁ = the initial amount that the spring is stretched = L1-L0 S1 = Calculate PE₁ = the initial potential energy. PE₁ = (b, ) Use conservation of energy to compute the block's velocity (V₂) when the block is directly under the spring's pivot point. (a3, 0h V₂ = m m m m/s]

University Physics Volume 1
18th Edition
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Chapter8: Potential Energy And Conservation Of Energy
Section: Chapter Questions
Problem 78AP: A block of mass 300 g is attached to a spring of spring constant 100 N/m. The other end of the...
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Conservation of energy
A spring is attached to a pivot whose height above the top of the block is
h = 0.40 m
The spring constant is k = 800 N/m
The spring's unstretched length = Lo= 0.30 m
The block is initially at rest with the spring at angle = 0 = 45 degrees
relative to the vertical. When the block is released, the spring will pull it
to the right.
The mass of the block is m = 4 kg
The block slides on a greased surface, so there is no friction.
(al,
Calculate L₁ = the initial length of the spring as shown in the figure.
L₁ =
Calculate s₁ = the initial amount that the spring is stretched = L1-L0
S1 =
Calculate PE₁ = the initial potential energy.
PE₁ =
(b,
) Use conservation of energy to compute the block's velocity (v₂) when the block is directly
under the spring's pivot point.
(a2
(a3,
0h
V₂ =
m
m
m
m/s
Transcribed Image Text:Conservation of energy A spring is attached to a pivot whose height above the top of the block is h = 0.40 m The spring constant is k = 800 N/m The spring's unstretched length = Lo= 0.30 m The block is initially at rest with the spring at angle = 0 = 45 degrees relative to the vertical. When the block is released, the spring will pull it to the right. The mass of the block is m = 4 kg The block slides on a greased surface, so there is no friction. (al, Calculate L₁ = the initial length of the spring as shown in the figure. L₁ = Calculate s₁ = the initial amount that the spring is stretched = L1-L0 S1 = Calculate PE₁ = the initial potential energy. PE₁ = (b, ) Use conservation of energy to compute the block's velocity (v₂) when the block is directly under the spring's pivot point. (a2 (a3, 0h V₂ = m m m m/s
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