# A 2-kg blob of putty moving 3 m/s slams into a 2-kg blob of putty at rest. What is the speed of the two stuck-together blobs of putty immediately after colliding? What is the speed of the two blobs if the one at rest was 4-kg?

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The speed of the two stuck-together blobs of putty immediately after colliding is 1.5 m/s. If the blob at rest was 4 kg, the speed of the two blobs after colliding would be 1 m/s.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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