Kinetic energy is simply 1/2 *mass* velocity^2
so since you know both mass and velocity you should be able to calculate the kinetic energy.
Answer:
Spring force constant = 1.168 N/m
Explanation:
The period of an oscillating spring can be obtained using the formula:
T = 2π
The parameters available for the solution of the problem are itemized as follows:
Mass of air-track glider = 0.2 kg
Period of oscillation , T = 2.60 seconds
<em>( This is the period of oscillation because it is the time it takes the glider to move through the equilibrium point twice, thus the time it takes for the motion to e a complete cycle)</em>
Spring constant, k = ?
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inserting the parameters, we have
2.6 = 2π
=
Squaring both sides to remove the square root, we have
= 
Solving for K, by cross multiplying, we obtain the value of k as 1.168 N/m
∴ The value of the spring's force constant is = 1.168 N/m
Answer:
X₃₁ = 0.58 m and X₃₂ = -1.38 m
Explanation:
For this exercise we use Newton's second law where the force is the Coulomb force
F₁₃ - F₂₃ = 0
F₁₃ = F₂₃
Since all charges are of the same sign, forces are repulsive
F₁₃ = k q₁ q₃ / r₁₃²
F₂₃ = k q₂ q₃ / r₂₃²
Let's find the distances
r₁₃ = x₃- 0
r₂₃ = 2 –x₃
We substitute
k q q / x₃² = k 4q q / (2-x₃)²
q² (2 - x₃)² = 4 q² x₃²
4- 4x₃ + x₃² = 4 x₃²
5x₃² + 4 x₃ - 4 = 0
We solve the quadratic equation
x₃ = [-4 ±√(16 - 4 5 (-4)) ] / 2 5
x₃ = [-4 ± 9.80] 10
X₃₁ = 0.58 m
X₃₂ = -1.38 m
For this two distance it is given that the two forces are equal
Answer: velocity has a direction, while speed is the distance travelled by an object.
Explanation:
As electrons move through the conductor, some collide with atoms, other electrons, or impurities in the metal.
