Answer:
Step-by-step explanation:
I don’t understand!!!
1 answer:
Answer:
A
Step-by-step explanation:
We can use momentum and conservation of momentum equation to solve this problem. The equation would be:
m_1 is given as 2
v_1 is given as 3
m_2 is what we want
v_2 is 0 since they are sticking together after collision
v_3 is the final velocity at the resultant end, which is 1
Substituting and solving via algebra:
Thus, mass of 2nd box is 4kg
Answer choice A is right
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Answer:
Step-by-step explanation:
For this exercise it is important to remember the multiplication of signs:
In this case, given the following expression:
You can idenfity that both factors are negative. Then, the product (The result of the multiplication) will be positive.
Then, in order to get the product, you need to multiply the numerator of the fraction by -8. So, you get:
You can notice that the numerator and the denominator of the fraction obtained cannot be divided by the same number; therefore, the fraction cannot be simplified.