When you stretch a spring 20 cm past its natural length, it exerts a force of 8
2 answers:
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Answer:
The charge inside the cube is null.
Explanation:
If we apply the gauss theorem with a cubical gaussian surface of the size of the cube:
If we consider than the direction of the electric field is , we can solve the problem differentiating the integral for each face of the cube:
E₀ is a constant and each surface is equal to each other, so:
Therefore:
Answer:
3) 52500N
Explanation:
We use the mathematical definition of impulse as follows;
were F is the force experienced, t is the time of impact, m is the mass of the object and v is the velocity of impact.
Given; m = 4.5kg, v = 35m/s, t = 3 milliseconds
however,
From equation (1);
.
Substituting all necessary values into equation (2), we obtain the following;