. 4 polnts A new event has been proposed for the Winter Olympics. An athlete wil

Question

. 4 polnts A new event has been proposed for the Winter Olympics. An athlete will sprint 100-m, starting from rest, then leap onto a 20-kg bobsled. The person and bobsled will then slide down a 50-nm long ice covered ramp, sloped at 20%, and into a spring with a carefully calibrated spring constant of 2000 N/m. The athlete who compresses the spring the farthest wins the gold medal. Lisa, whose mass is 50 kg, has been training for this event. She can reach a maximum speed of 12-m/s in the 100 m dash wn (a) How far will Lisa compress the spring? (b) The Olympic committee has very exact specifications about the shape and angle of the ramp. Is this necessary? If the committee asks your opinion, what factors about the ramp will you tell them are important? (Select all that apply.) friction angle shape vertical descent color

Explanation / Answer

a)

By Conservation of momentum

(m+M)V=MVo

(20+50)V=50*12

V=8.57 m/s

By Conservation of energy

(1/2)Kx2=(1/2)(m+M)V2+(m+M)gh

(1/2)*2000*x2=(1/2)*(50+20)*8.572+(50+20)*9.8*(50sin20)

x=3.78 m

b)

friction and Vertical descent

Related Questions

Navigate

• Browse (All)
• Browse #
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.