Why are the forces exerted on the outside world by the limbs of our bodies usually much smaller than the forces exerted by muscles inside the body?

Q: Can an object be in equilibrium when only one force acts on it? Explain.

A: Equilibrium of a body is a state where the net force acting on the body is zero. Force is a push or…

Q: The leg and cast in the figure below weigh 160 N (w1). Determine the weight w2 and the angle α…

A: the tension on the strings are balanced by the weight,

Q: Why do you need to brace yourself before pushing on something heavy or throwing something?

A: Bracing: Bracing is defined by a type of voluntary core activation that enabling tighten up on…

Q: The arm in the figure below weighs 38.9 N. The force of gravity acting on the arm acts through point…

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Q: Consider the person lifting a heavy box with his back, shown in Figure The mass of the upper body is…

A: Using condition of equilibrium, the total mass along x and y axis must be conserved. That is,

Q: If the maximum force the biceps muscle can exert is 1000 N, can we pick up an object that weighs…

A: To pick up an object, the bicep must exert a torque which is given as, τ=r⊥×F

Q: Explain why the forces in our joints are several times larger than the forces we exert on the…

A: Limbs are third class levers, with the mechanical advantage less than one. The applied force…

Q: During a circus act, one performer swings upside down hanging from a trapeze holding another, also…

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Q: The chewing muscle, the masseter, is one of the strongest in the human body. It is attached to the…

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Q: tension exerted by the string-

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Q: It is easier to pull than to push a lawn roller, why?

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Q: Consider the following figure m50.0 kg 0.90 m 1.50 m (a) what force in newtons should the woman in…

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Q: Ten bags of top soil, each weighing 180 N, are placed on a 2.05-m long sheet of wood. They are…

A: The total momentum at one end (left side),

Q: A pair of forces that causes one face of a material to slide relative to an adjacent face are called…

A: False

Q: A student's head is bent over her physics book. The head weighs P = 25.6 N and is supported by the…

A: Given head weight=p=25.6Nmuscle force =Fm→=60.0N, 35° below the horizontalwe have to…

Q: BIO The leg and cast in Figure P4.20 weigh 220 N (w). Deter- mine the weight w2 and the angle a…

A: Given: The weight of the leg is 220 N. The free-body diagram is given below.

Q: An object is subject to two forces that do not point in opposite directions. Is it possible to…

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Q: A horse is hitched to a wagon. Since the wagon pulls back on the horse just as hard as the horse…

A: The wagon will not be in equilibrium since there exists net external force which comes as a result…

Q: The upper leg muscle (quadriceps) exerts a force of 1250 N, which is carried by a tendon over the…

A: considering the first condition of equilibrium,

Q: Quadriceps tendon Femur Patella 0-42 Patella tendon

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Q: Explain one of the reasons why pregnant women often suffer from back strain late in their pregnancy.

A: Pregnant women often suffer from back strain late in their pregnancy because they lift their child…

Q: The figure shows a person whose weight is W = 782 N doing push-ups. Find the normal force exerted by…

A: Given:- Weight of the person is W=782N.   Suppose the normal force exerted by the floor on hand is…

Q: Can a body be in equilibrium, if it is in motion? Explain.

A: Yes, Such an equilibrium situation is called dynamic equilibrium. So an object in equilibrium can…

Q: 5. Find the maximum weight of the bucket that the wire system can support so that no single wire…

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Q: A uniform 23.0 kg chain 2.00 mm long supports a 50.0 kg chandelier in a large public building.…

A: To determine,1)Find the tension in the top link of the chain. 2)Find the tension in the bottom link…

Q: What is the magnitude of the downward force exerted on the ankle joint by the tibia?

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Q: 4. An unknown mass is supported by two wires as shown. a) Find the mass. b) Find the tension T. 4.…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: In about 1915, Henry Sincosky of Philadelphia suspended himself from a rafter by gripping the rafter…

A: Net force on Sincosky is zero since he is suspended on the rafters. As he is gripping the rafter…

Q: If only one force acts on an object, can it be in equilibrium?Explain.

A: When a force acts on a body, the body either undergoes a change in motion or deformation. The…

Q: 4. Our one-eyed friend here wants to lift up a 25 kg barbell. If the angle his hands make with the…

A: Ans:- Image-1

Q: Find the tension in the two cords shown in the figure. Neglect the mass of the cords, and assume…

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Q: The normal force on the head of the femur in the knee is

A: Given:- The normal force N = 300 N  The coefficient of the friction  μ= 0.003 and arthritic joint μ=…

Q: Why can't you "push" a rope or string?

A: Rigid object: In the rigid objects, the distance between the two specific points on the object will…

Q: Can a body be in equilibrium , even if only one external force acts on it? Explain.

A: If a body is in equilibrium, then all the forces acting on them should be balanced. It means that if…

Q: Is the body ever in equilibrium?

A: Body is never in equilibrium.  Equilibrium is the state of balance. When a body or a system is in…

Q: The strain produced in a body is directly proportional to the stress applied on it, is called…

A: Hooke’s law states that the strain in a solid is proportional to the applied stress within the…

Q: The leg and cast in Figure P4.20 weigh 220 N (w1). Determine the weight w2 and the angle α needed so…

A: If the hip exerts no force on the leg, the system must be in equilibrium as shown in free body…

Q: As you increase the force that you apply while pulling on arope, which of the following is NOT…

A: The relation for the stress is, σ=FA When the force is increased, the stress on the rope increases.…

Q: During a circus act, one performer swings upside down hanging from a trapeze holding another, also…

A: The area of cross section can be obtained as A=πr2=π0.0174m2=9.5×10-4 m2

Q: Forces tend to do what to objects upon which they act?   a. move them     b. rotate them     c.…

A: effect of force

Q: A spanner (or wrench) has a long handle. Why?

A: A spanner is a tool with a shaped opening used for gripping and turning a nut or bolt.

Q: 0.20 L 0.40 L 3. The foot of a ladder rests against a wall and its top is he rope, as shown in the…

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Q: A sign hanging in the window of Joe's Diner has a mass of 4 kg. If the supporting strings each make…

A: Please see the answer below

Q: Why is it easier to hold a 10 kg dumbbell in your hand at your side than it is to hold it with your…

A: Introduction: Torque is defined as the tendency of a force to rotate an object about an axis.…

Q: Note: Answer (FIVE) questions only Q1: Determine the magnitudes of the forces C and T, which, along…

A:

Q: Determine the tension in each cord used to support the 100-kg crateshown.

A: Free body diagram of the crate is- The force in each of the crate can be determined by…

Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.