Question

Part C Review A 4.5 kg box slides down a 5.2-m -high frictionless hill starting from rest, across a 2.3-m -wide horizontal surface then hits a horizontal spring with spring constant 470 N/m How far is the spring compressed? Express your answer using two significant figures The other end of the spring is anchored against a wall The ground under the spring is frictionless, but the 2.3-m- long horizontal surface is rough. The coefficient of kinetic friction of the box on this surface is 0.27 Submit Request Answer Part D Including the first crossing, how many complete trips will the box make across the rough surface before comir Request Answer Submit Provide Feedback Review Part A A 4.5 kg box slides down a 5.2-m -high frictionless hill starting from rest, across a 2.3-m -wide horizontal surface then hits a horizontal spring with spring constant 470 N/m What is the speed of the box just before reaching the rough surface? Express your answer using two significant figures The other end of the spring is anchored against a wall The ground under the spring is frictionless, but the 2.3-m- long horizontal surface is rough. The coefficient of kinetic friction of the box on this surface is 0.27 m/s Submit Part B What is the speed of the box just before hitting the spring? Express your answer using two significant figures m/s Submit Re t Answer

Answer 1

Sohefion 2- Kfrom Consent i叨@g erenca 2 2- 2

④ ±Total energy the bearing 2,3 t N2 2932