A Super Dart of Mass 20 G, Traveling at $30 ^ { \circ }$

question 111

Multiple Choice

A super dart of mass 20 g, traveling at 350 m/s, strikes a steel plate at an angle of $30 ^ { \circ }$ with the plane of the plate, as shown in the figure. It bounces off the plate at the same angle but at a speed of 320 m/s. What is the magnitude of the impulse that the plate gives to the bullet?

• A) \(4.3 \mathrm {~N} \cdot \mathrm { s }\)
• B) \(300 \mathrm {~N} \cdot \mathrm { s }\)
• C) \(0.30 \mathrm {~N} \cdot \mathrm { s }\)
• D) \(6.7 \mathrm {~N} \cdot \mathrm { s }\)
• E) \(0.52 \mathrm {~N} \cdot \mathrm { s }\)

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