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True/False 1. An object is fired from a cannon along a horizontal range. There are two...

True/False

1. An object is fired from a cannon along a horizontal range. There are two angles which have the same range.

2. A mass is observed moving to the east at 20 m/s. Some time later it is moving north at the same speed. Did some external force act on the mass?

3. An object is fired from the edge of a high cliff at a 45° angle. Is the range equation useful for finding where the object hits the ground?

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