If you are caught outdoors in a thunderstorm, why should you not stand under a tree? Can you think of a reason why you should not stand with your legs far apart? Or why lying down can be dangerous? (

Q: A 0.190-kg wooden rod is 1.20 m long and pivots at one end. It is held horizontally and then…

A: Given,  Mass of rod, m=0.19kg Length of rod, L=1.2m

Q: Why is rust a greater problem for thin iron rods than for thick iron pillars?

A: Iron rusts when exposed to air.

Q: please help !

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Q: The bones of the forearm (radius and ulna) are hinged to the humerus at the elbow. The biceps muscle…

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Q: What happens when the stress applied to the body is increased beyond the maximum value and is…

A:

Q: A vertical off-shore structure is built to withstand a maximum stress of 109 Pa. Is the structure…

A: Given : The maximum stress the structure can handle, P = 109 PaDepth of the sea, d = 3 km = 3 × 103…

Q: In a triad ground rod arrangement, the distance between the rods should be how many times greater…

A: Given that:- Length of rods are same.

Q: A uniform 20 kg wooden plank is supported by a fulcrum at the midpoint.  From the fulcrum, a 30 kg…

A:

Q: Why does your hair stand up when you go down a slide?

A: The hair stand up on going down the slide because of static electricity. On going down the slide,…

Q: held close to the suspended table-tennis ball shown in Fig. 9.1. The table-tennis ball with metal…

A: The charge developed in the metal paint on the ball is negative , when rod is held closed to it .

Q: Two friends in a hurry to go picnicking decide to stand outside a window, holding a cloth to catch a…

A: We know from the Newton's second law, The net external force equals the change in momentum of a…

Q: A very fine fabric 0.020 mm in diameter can support a 28 g object. How does the stress in the fabric…

A:

Q: A man is travelling in the car. He is driving the car. If he is taking a turn in the road. He is…

A: NOTE: As you have requested only answers without any explanation

Q: Both portions of the rod ABC are made of an aluminum for which E5 70 GPa. Knowing that the magnitude…

A:

Q: Why is it important to secure file cabinets to the floor, especially cabinets with heavy loads in…

A: It is dangerous to pull open the upper drawers of a fully-loaded file cabinet that is not secured to…

Q: The upper leg muscle (quadriceps) exerts a force of FQ = 1140 N, which is carried by a tendon over…

A: It is given that,

Q: Only with great difficulty can you crush an egg when squeezing it along its long axis, but it breaks…

A: The ends of an egg form arches. Therefore, pressing them together along the long axis will only…

Q: A friend tells you that a refrigerator door, beneath its layer of white-painted plastic, is made of…

A: Given: A friend tells you that a refrigerator door, beneath its layer of white-painted plastic, is…

Q: A scaffold of mass 60 kg and length 5.0 m is supported in a horizontal position by a vertical cable…

A:

Q: A 50kg girl wearing high heels shoes balances on a single heel. The heel is circular with a diameter…

A: The area of the heel is,Substitute the values,

Q: F 1.5 m 1m D 2 m Fig.4 from Fig 4 Find intrenal force in member AB Where F = 67 KN

A:

Q: A person places a bathroom scale in the center of the floor and stands on the scale with his arms at…

A: When we raise our arms upwards, we apply a force on them, directed upwards. By Newton's third law,…

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

A:

Q: A uniform tubular pipe 100ft long and weighing 55lbs is supported by a fulcrum as shown in the…

A:

Q: If the upward force on the lower performer's legs is 3mg (three times her weight), how much do the…

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Q: An 82.0 kg-diver stands at the edge of a light 5.00-m diving board, which is supported by two narrow…

A:

Q: The upper leg muscle (quadriceps) exerts a force of FQ = 1140 N, which is carried by a tendon over…

A: The free body diagram is shown as,

Q: A very fine fabric 0.020 mm in diameter can support a 20 g object. How does the stress in the fabric…

A: Given The diameter of the fine fabric is df=0.020 mm=0.020×10-3 m. The mass of an object is m=20…

Q: how far should you separate two particles which have 5 nC and 16 nC in order to have a force of…

A: charge on first particle (q) = 5 nC charge on second particle (Q) = 16 nC force (F) = 5×10-4 N let…

Q: A lift of mass 1650 kg is suspended by a steel cable. The lift can move upwards at a maximum…

A: Given- Mass of lift(m)= 1650 Kg Acceleration of lift (a) = 1.5 m/s2 Maximum tensile stress on cable…

Q: Wan Textbook Problem 157 views A 1 other carning Solu expe Ques When ski jumpers are airborne (Fig.…

A: As per Newton's Third Law, every action has an equal and opposite reaction. Ski jumpers bend their…

Q: When you bend over, a series of large muscles, the erector spinae, pull on your spine to hold you…

A: Given data γ=300 θ=120 wh=160 N wT=320 N

Q: 800 N man is standing on a 4 m long plank of wood that is supported at each end by vertical ropes.…

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Q: When you rub your hands together, can you push harder on one hand than the other?

A: Newton's third law of motion tells us that every action has an equal and opposite reaction. So, if…

Q: A horizontal, uniform meter stick supported at the 50-cm mark has a mass of 0.50 kg hariging from it…

A: The rotational analog of linear force is called torque. It is given by the product of the force and…

Q: When you carry a heavy load with one arm, why do you tend to hold your free arm away from your body?

A: - to shift the Centre of gravity of body away from load

Q: Two uncharged metal spheres, L and M, are in contact. A negatively charged rod is brought close to…

A:

Q: When throwing a football you are always instructed to follow-through. What is the advantage of…

A: The football has its unique shape. It has special instructions for holding for better grip, throwing…

Q: A vertical circular cross-sectional jet of air strikes a conical deflector as shown in Figure H. A…

A: The linear momentum of a particle is the product of the mass of the particle with the velocity of…

Q: Rank by the amount of fractional increase in length under increasing tensile stress, from smallest…

A:

Q: Why are flaps used at the leading and trailing edges of the wings of large aircraft during takeoff…

A:

Q: What kind of forces can be experienced while rubbing the two objects together?

A: When 2 object are rubbed with each other, heat is generated due to rubbing of hands

Q: A lighting fixture can be hung from wires of identical size and shape made of aluminum, brass, or…

A: Ans:- Image-1

Q: A steel wire of diameter 4.72 mm stretches by 7.98 mm when a 320 -kg piece of equipment is suspended…

A: diameter of wire (d) = 4.72 mm Stretch in length (y) = 7.98 mm mass suspended (m) = 320 kg New…

Q: What is the force acting normally per unit area on the surface of the body?

A: The force acting per unit area on the surface of a body is called pressure.