physics page 228 page 230 page 230 Draw figure Draw figure Draw figure 5. Giamba

Question

physics

page 228 page 230 page 230 Draw figure Draw figure Draw figure 5. Giambattista: Problem 21 6. Giambattista: Problem 53 7. Giambattista: Problem 63 8. Do Giambattista: Problem 69 (a),(b).(c) with the following parameters (i) All surfaces have a coefficient of kinetic friction =0.25 (ii) The angle between the ramp and the horizontal is 40° (ii) The distance from the bottom of the ramp to the spring is D A 20kg block is released from rest and allowed to slide down a frictionless surface and into a spring. The far end of the spring is attached to a wall as sh The initial height of the block is 0.50 m abowe the low- 0.5 m est part of the slide and the spring coestant is 450 N/ (a) What is the tick's sped when i, atheight of 0.25 m above the base of the slide? :b) How far ithe pring compressed c) The spring sends the block hack to the ft How high does

Explanation / Answer

Here,

a)

Increase in K.E. = Decrease in P.E. of block

let P.E. = 0 at y = 0.25m

0.5*m*v^2 = m*g*y

v = (2*g*y)^1/2 = (2*9.8*0.25)^1/2 = 2.2136 m/s

b)

0.5 * k*x^2 = m * g * y

x = (2*m*g*y/k)^1/2 = (2*2*9.8*0.50/450)^1/2 = 0.2087 m

c)

since the surface is frictionless , no non conservative forces do work on the block.So,the block will return to its previous height 0.50m

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