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sampleexam3

# sampleexam3 - 1 A 1.5-kg playground ball is moving with a...

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1. A 1.5-kg playground ball is moving with a velocity of 3.0 m/s directed 30° below the horizontal just before it strikes a horizontal surface. The ball leaves this surface 0.50 s later with a velocity of 2.0 m/s directed 60° above the horizontal. What is the magnitude of the average resultant force on the ball? a. 14 N b. 11 N c. 18 N d. 22 N e. 3.0 N 2. A 10-g bullet moving 1000 m/s strikes and passes through a 2.0-kg block initially at rest, as shown. The bullet emerges from the block with a speed of 400 m/s. To what maximum height will the block rise above its initial position? a. 78 cm b. 66 cm c. 56 cm d. 46 cm e. 37 cm 3. An 80-g particle moving with an initial speed of 50 m/s in the positive x direction strikes and sticks to a 60-g particle moving 50 m/s in the positive y direction. How much kinetic energy is lost in this collision? a. 96 J b. 89 J c. 175 J d. 86 J e. 110 J 4. A 3.0-kg mass sliding on a frictionless surface explodes into three 1.0-kg masses. After the explosion the velocities of the three masses are: (1) 9.0 m/s, north; (2) 4.0

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sampleexam3 - 1 A 1.5-kg playground ball is moving with a...

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