Physics1A_Midterm2

Physics1A_Midterm2 - Physics 1A Midterm # 2 February 20th...

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Physics 1A F e b r u a r y 2 0 th 2008 Midterm # 2 Name: D i s c u s s i o n s e c t i o n : 1) (33 pts) A mass m, resting on a surface with friction, is connected to a spring at rest. At time t = 0 a projectile of mass m p and velocity v p strikes the mass m. a) Calculate the maximum compression of the spring after the collision, assuming the projectile sticks to the mass. b) Would the spring compress more or less if the projectile bounces elastically off the mass? ( μ k =0.5, m = 0.2 kg, m p =0.05kg, v p =50m/s, k = 25 N/m)
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2) (33 pts) A spring (k = 75 N/m) has an equilibrium length l = 1 m. The spring is compressed to a length 0.5 m and a mass of 2 kg is placed at its free end on a frictionless slope which makes an angle of 40 degrees with respect to the horizontal. The spring is then released. a) If the mass is not attached to the spring, how far up the slope will the mass move before coming to a rest? b) If the mass is attached to the spring, what is the maximum distance reached by the
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This note was uploaded on 10/27/2008 for the course PHYS 1A taught by Professor Musumeci during the Winter '08 term at UCLA.

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Physics1A_Midterm2 - Physics 1A Midterm # 2 February 20th...

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