# A what is the work done by f b what is the magnitude

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(A) What is the work done by F ? (B) What is the magnitude of F ? 37 ° F

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PRACTICE EXAM 2 – PHYS 15200 Page 3 of 4 2) A 2.00-kg object sitting on a frictionless surface is attached to a horizontal spring on one side and a massless string on the opposite side. The spring constant is 8.00 N/m. The string passes over a frictionless pulley and is fastened to a 1.00-kg block. At t = 0, the 1.00-kg block is given a downward speed of 1.50 m/s. Use energy methods to determine the distance that the 1.00-kg block falls before it comes to rest. 2.00 kg 1.00 kg
PRACTICE EXAM 2 – PHYS 15200 Page 4 of 4 3) A projectile (mass m ) is fired from a gun with an initial velocity of 24.0 m/s at 60 ° above the horizontal. When the projectile reaches its maximum height, it explodes into two pieces, each of mass m /2. One of the pieces has a velocity of 20.0 m/s at 40 ° above the horizontal immediately after the explosion. (A) What is the speed of the other piece immediately after the explosion? (B) What is the direction of motion of the other piece immediately after the explosion?
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