Answer:
A 70 kg box is slid along the floor by a 400 n force. The coefficient of friction between the box and the floor is 0. 50 when the box is sliding
Complete Question:
Find the resistance of a wire of length 0.65 m, radius 0.25 mm and resistivity 3 * 10^{-6} ohm-metre.
Answer:
Resistance = 9.95 Ohms
Explanation:
<u>Given the following data;</u>
Length = 0.65 m
Radius = 0.25 mm to meters = 0.00025 m
Resistivity = 3 * 10^{-6} ohm-metre.
To find the resistance of the wire;
Mathematically, resistance is given by the formula;
![Resistance = P \frac {L}{A}](https://tex.z-dn.net/?f=%20Resistance%20%3D%20P%20%5Cfrac%20%7BL%7D%7BA%7D%20)
Where;
- P is the resistivity of the material.
- L is the length of the material.
- A is the cross-sectional area of the material.
First of all, we would find the cross-sectional area of the wire.
Area of circle = πr²
Substituting into the equation, we have;
Area = 3.142 * (0.00025)²
Area = 3.142 * 6.25 * 10^{-8}
Area = 1.96 * 10^{-7} m²
Now, to find the resistance of the wire;
![Resistance = 3 * 10^{-6} * \frac {0.65}{1.96 * 10^{-7}}](https://tex.z-dn.net/?f=%20Resistance%20%3D%203%20%2A%2010%5E%7B-6%7D%20%2A%20%5Cfrac%20%7B0.65%7D%7B1.96%20%2A%2010%5E%7B-7%7D%7D%20)
![Resistance = 3 * 10^{-6} * 3316326.531](https://tex.z-dn.net/?f=%20Resistance%20%3D%203%20%2A%2010%5E%7B-6%7D%20%2A%203316326.531%20)
<em>Resistance = 9.95 Ohms </em>
Answer:
Explanation:
As it’s difficult to catch it from up.
Gravitational force will pull us when we jump.
If gravity was not there, he could catch the ball. But he will float in the sky after that.
That’s the answer
Teddyber continue to move forward because Newton law 1. moving object continue to move until something external make it to stop. no seat belt on teddy ber so only dashboard can make her stop. same if people in car and no seatbelt.