Figure 3 shows a stationary metal block hanging from the middle of a stretched wire which is suspended from a horizontal beam. T
he tension in each half of the wire is 15 N. (a) Calculate for the wire at A, (i) the resultant horizontal component of the tension forces, (ii) the resultant vertical component of the tension forces. Can someone explain why the first one is 0?
1 answer:
Explanation:
(i) The horizontal component of the tension in the right wire points right, and the horizontal component of the tension in the left wire points left. Since these components are equal and opposite, the resultant horizontal force is 0.
∑Fₓ = 15 N cos 20° − 15 N cos 20°
∑Fₓ = 0 N
(ii) ∑Fᵧ = 15 N sin 20° + 15 N sin 20°
∑Fᵧ = 10.26 N
You might be interested in
Answer:
a) , b)
, c)
.
Explanation:
a) Let assume that car travel on a horizontal surface. The equations of equilibrium of the car are:
After some algebraic handling, the following expression for the propulsion force is constructed:
b) The power require to move the car at a speed of 5 meters per second is:
c) The efficiency of the car is:
Answer:
a.
b.
Explanation:
Using the triangle theorem both triangle the woman makes between the light so the rate of change of length can use geometry first
Solve to find the rate relation
Now the rate of the change rate
Finally the rate of her shadow moving