Nate the Skate was an avid physics student whose main non-physics interest in li

Question

Nate the Skate was an avid physics student whose main non-physics interest in life was high-speed skateboarding. In particular, Nate would often don a protective suit of Bounce-Tex, which he invented, and after working up a high speed on his skateboard, would collide with some object. In this way, he got a gut feel for the physical properties of collisions and succeeded in combining his two passions.* On one occasion, the Skate, with a mass of 115 kg, including his armor, hurled himself against a 891-kg stationary statue of Isaac Newton in a perfectly elastic linear collision. As a result, Isaac started moving at 1.21 m/s and Nate bounced backward. What were Nate's speeds immediately before and after the collision? (Enter positive numbers.) Ignore friction with the ground.



Before:

___________m/s


After:



___________m/s

Explanation / Answer

Speed Before = =Vi

Speed after = Vf

e = 1

1 = 1.21 - Vf / Vi - 0

Vi = 1.21 - Vf - (1)

Conserving momentum

115 x Vi = 115 x Vf + 891 x 1.21 - (2)

By (1) and (2)

Vf = - 5.29 m/s

(It says to enter positive value , hence, Vf = 5.29 m/s) As kate bounced backwarsd the true velocity would be negative only

Vi = 4.08 m/s (By putting Vf value in equation 2)

Related Questions

Navigate

• Browse (All)
• Browse N
• Subjects

---

---

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