A sphere of mass 3.4 ✕ 10-4 kg is suspended from a cord. A steady horizontal breeze pushes the sphere so that the cord makes a constant angle of 41° with the vertical.(a) Find the magnitude of that push. N(b) Find the tension in the cord. N
Question
A sphere of mass 3.4 ✕ 10-4 kg is suspended from a cord. A steady horizontal breeze pushes the sphere so that the cord makes a constant angle of 41° with the vertical.(a) Find the magnitude of that push. N(b) Find the tension in the cord. N
Solution
(a) To find the magnitude of the push (force), we need to consider the forces acting on the sphere in the horizontal direction. The only horizontal force is the push from the breeze, which we'll call F. Since the sphere is in equilibrium (not accelerating), the sum of the forces in the horizontal direction must be zero. This means that the horizontal component of the tension in the cord must balance the push from the breeze.
The horizontal component of the tension (T) can be found using the equation Tsin(θ) = F, where θ is the angle the cord makes with the vertical. Rearranging for F gives F = Tsin(θ).
We don't know T yet, but we can find it by considering the forces in the vertical direction. The only vertical forces are the weight of the sphere (mg, where m is the mass and g is the acceleration due to gravity) and the vertical component of the tension (Tcos(θ)). Since the sphere is in equilibrium, these forces must balance, so mg = Tcos(θ). Rearranging for T gives T = mg/cos(θ).
Substituting this into the equation for F gives F = (mg/cos(θ))sin(θ) = mgtan(θ). Substituting the given values (m = 3.4 ✕ 10^-4 kg, g = 9.8 m/s^2, θ = 41°) gives F = (3.4 ✕ 10^-4 kg)(9.8 m/s^2)tan(41°) = 0.0027 N.
(b) The tension in the cord can be found using the equation T = mg/cos(θ). Substituting the given values gives T = (3.4 ✕ 10^-4 kg)(9.8 m/s^2)/cos(41°) = 0.0034 N.
Similar Questions
1.1 A ball of mass m1 and a block of mass m2 are attached by a light weight cord that passes over a frictionless pulley of negligible mass as in Figure 1. The block lies on a frictionless incline of angle θ. Determine the magnitude of the acceleration of the two objects and the tension in the cord. Figure 1
An object is suspended by two ropes. One rope has a tension of 410 N at an angle of 60 to thehorizontal. The other rope has a tension of 210 N at an angle of 10 to the horizontal.ropes1060410 N210 NobjectThe object is in equilibrium.What is the mass of the object?A 40 kg B 42 kg C 390 kg D 410 kg
Find the magnitude of the tension in each supporting cable shown below. In each case, the weight of the suspended body is 100.0 N and the masses of the cables are negligible.
A 3.7-kg sphere is suspended by a cord that passes over a 1.3-kg pulley of radius 3.6 cm. The cord is attached to a spring whose force constant is k = 86 N/m as in the figure below. Assume the pulley is a solid disk.An apparatus is shown with a wall extending upward from the left end of a table and a pulley mounted above the right edge of the table. A horizontal spring labeled k has its left end attached to a horizontal cord, the other end of which is attached to the wall. The center line of the spring is aligned with the top of the pulley. The right end of the spring is attached to a second cord. This cord extends horizontally, over the pulley and 90° around it where it hangs downward. A sphere of mass m hangs from the end of the second cord.(a) If the sphere is released from rest with the spring unstretched, what distance does the sphere fall through before stopping? m(b) Find the speed of the sphere after it has fallen 25 cm. m/s
A lantern suspended from a verandah roof by a 50 cm chain is blown by the wind so that it hangs at an angle θ to the vertical for the duration of the wind gust. If the wind blows from the east and exerts a constant force of 20 N, determine the tension, T , in the chain and the angle θ
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.