A new event has been proposed for the Winter Olympics. As seen in the figure, an

Question

A new event has been proposed for the Winter Olympics. As seen in the figure, 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-m-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 40 kg, has been training for this event. She can reach a maximum s of 12 m/s in peed the 100 m dash. (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? What factors about the ramp are important?

Explanation / Answer

Given;

theta = 20 degree

distance

d = 50 m

spring constant , k = 2000 N/m

mass of lisa , m = 40 Kg

In using conservation of energy

0.5 * k * x^2 = m * g * h * sin(theta) + 0.5 * m * v^2

0.5 * 2000 * x^2 = 40 * 9.8 * 50 * sin(20) + 0.5 * 40 * 12^2

solving for x

Calculate And find x.

x = 3.06 m

the distance compressed by lisa is 3.06 m

B)

the important features of the ramp are angle, length and the coefficient of friction

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