A Block That Has a Mass M = 4

question 90

Multiple Choice

A block that has a mass M = 4.25 kg is hanging at rest on a light string.A projectile with a mass m = 250 g moving horizontally strikes M and sticks to it.The block and its projectile swing up and the center of mass rises a distance h = 12.0 cm.The speed of the projectile is approximately

• A)28 m/s
• B)42 m/s
• C)0.28 km/s
• D)26 m/s
• E)14 m/s

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