An empty train car of mass $2.0 \times 10 ^ { 4 }$ kg coasts along at 10 m/s. A 3000-kg boulder is suddenly dropped vertically into the car. Find the speed of the car immediately after the boulder is dropped in.

Question

An empty train car of mass $2.0 \times 10 ^ { 4 }$ kg coasts along at  10 m/s. A  3000-kg boulder is suddenly dropped vertically into the car. Find the speed of the car immediately after the boulder is dropped in.

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The Answer of An empty train car of mass $2.0 \times 10 ^ { 4 }$ kg coasts along at  10 m/s. A  3000-kg boulder is suddenly dropped vertically into the car. Find the speed of the car immediately after the boulder is dropped in.

An Empty Train Car of Mass 2.0×1042.0 \times 10 ^ { 4 }2.0×104

An Empty Train Car of Mass $2.0 \times 10 ^ { 4 }$