A carpenter is driving a nail straight into the northern wall of the house, with an average force of 1200 N. Find the magnitude of the torque of this force about a point on the wall 3.0 m to the right of the nail
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A carpenter is driving a nail straight into the northern wall of the house, with an average force of 1200 N. Find the magnitude of the torque of this force about a point on the wall 3.0 m to the right of the nail.
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- When opening a door, you push on it perpendicularly with a force of 67.5 N at a distance of 0.775 m from the hinges. What torque, in newton meters, are you exerting relative to the hinges?A bicycle wheel can be thought of a uniform hoop with a radius of 41 cm and mass 2.0 kg. Consider the case where the wheel start from rest and accelerates uniformly under the action of a constantly applied torque of 0.5 N-m exerted by a force at the edge of the wheel. The torque is caused by the bicycle chain acting at a radius of 11.5 cm from the center of the wheel. (a) How long does the wheel take to reach a speed of 10 rev/min? (b) Through how many revolutions does it turn while accelerating?An 80 cm long thin rod whose axis of rotation is in the center has a mass of 0.142 kg. A 2.5 N force is applied at one end perpendicularly, while a second 1.5 N force is applied 10 cm from the opposite end. Both forces are applied in the same direction. (a) Find the angular acceleration. (b) Determine the force needed for the rod to be in equilibrium, if the third force is applied at a 300 angle halfway between the 2.5 N and the axis of rotation. (72.6; -5.5)
- When you hold an ball by only your forearm, the main lifting muscle in your arm is the biceps. Suppose the mass of a forearm with hand is 1.80 kg. The biceps is connected to the forearm a distance of 2.50 cm from the elbow, and it holds a 44.5 N (about 10 lbs) ball at the end of the forearm at distance of 35.0 cm from the elbow. What is the magnitude of the torque about the elbow by the ball, in N·m? Use g = 10.0 m/s2. Your answer needs to have 3 significant figures, including the negative sign in your answer if needed. Do not include the positive sign if the answer is positive. No unit is needed in your answer, it is already given in the question statement.The angle between the beam and the floor is 15.0 degrees. The angle between the rope and the horizontal is 31.0 degrees. The beam is 4.10-m long and has a mass of 6.10 kg. The box sits a distance of d = 0.770 m from the upper end of the beam and has a mass of 9.60 kg.What is the torque due only to the weight of the box if the axis is at the hinge?(a) A woman opens a 1.35 m wide door by pushing on it with a force of 44.5 N applied at the center of the door, at an angle perpendicular to the door's surface. What magnitude of torque (in N · m) is applied about an axis through the hinges? (b) A girl opens the same door, using the same force, again directed perpendicular to the surface, but now the force is applied at the edge of the door. What magnitude of torque (in N · m) is applied about the axis through the hinges now?
- A person exerts a horizontal force of 40 N on the end of a door 95 cm wide. a)What is the magnitude of the torque if the force is exerted perpendicular to the door? b)What is the magnitude of the torque if the force is exerted at a 50.0 ∘∘ angle to the face of the door?Determine the net torque on the 3.5-m-long uniform beam shown in the figure. All forces are shown. Calculate about point C, the CM. Take counterclockwise torques to be positive. Calculate about point P at one end. Take counterclockwise torques to be positive.(a)A boy opens a 1.35 m wide door by pushing on it with a force of 43.5 N applied at the center of the door, at an angle perpendicular to the door's surface. What magnitude of torque (in N · m) is applied about an axis through the hinges? (b)A girl opens the same door, using the same force, again directed perpendicular to the surface, but now the force is applied at the edge of the door. What magnitude of torque (in N · m) is applied about the axis through the hinges now?
- Calculate the net torque about this axis due to the three forces shown in the figure if the magnitudes of the forces are F1 = 27.0 N, F2 = 16.7 N, and F3 = 14.9 N. The plate and all forces are in the plane of the page. Take positive torques to be counterclockwise.Find the total torque about the A axis due to the forces as shown in Figure (sin 250 = 0.4)A playground merry-go-round, made in the shape of a solid disk, has a diameter of 2.50 m and a mass of 350.0 kg. Two children, each of mass 30.0 kg, sit on opposite sides at the edge of the platform. Approximate the children as point masses. What torque is required to bring the merry-go-round from rest to 28.0 rev/min in 23.0 s?