Question

Problem 10.51 6 of 8 > Review Part A A freight company uses a compressed spring to shoot 2.00 kg packages up a 1.00-m-high frictionless ramp into a truck, as the figure(Figure 1) shows. The spring constant is 520 N/m and the spring is compressed 29.0 cm What is the speed of the package when it reaches the truck? Express your answer with the appropriate units Figure 1 of 1 > ? Value Units 1.0 m Submit Request Answer 50-cm-long sticky spot ► Part B

Answer 1

10.51

for spring energy

0.5 m u^2 = 0.5 k x^2

2* u^2 = 520* 0.29^2

u = 4.676 m/s

using 3rd equation of motion

v^2 = u^2 - 2gh

v^2 = 4.676^2 - 2* 9.8* 1

v = 1.505 m/s

====

using conservation of energy

0.5 m v^2 = mgh - F sin x * d

0.5* 67* v^2 = 67* 9.8* 65 - 200 cos 20 * 65 sin 20

v = 33.9 m/s

=====

Comment before rate in case any doubt, will reply for sure.. goodluck