85 : A motor cyclist moves around a circular track of length 628 m with a speed of 72 km/hr. Find to what extent he must lean inward to keep the balance.
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Q: You often hold your hands away from you to keep from tipping over. This is because:
A: b) You’re decreasing your rotational inertia.
Q: Problem 7: Two children of mass 17 kg and 32 kg sit balanced on a seesaw with the pivot point…
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Q: Activity: Stand straight with your heels, back, and head against a wall. Bend forward from your…
A: When you're standing straight, your center of gravity is somewhere around your belly button. When…
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Q: 2. A vendor hangs an 8.0 kg sign in front of his shop with a cable held away from building by a…
A: Given, A vendor hangs an 8 kg sign with a cable, m=8 kg
Q: A homeowner is trying to move a stubborn rock from his yard. By using a a metal rod as a lever arm…
A: Given data: Mass of the rock (m) = 525 kg Applied force (F) = 711 N According to the condition of…
Q: 4m 2m C 2m 2m 30 4m A 400 kg nonuniform boom, 6.0 m long, is loosely pinned at the pivot at P. A 600…
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Q: Tasha has mass 20 kg and wants to use a 5.0-m board of mass 12 kg as a seesaw. Her friends are busy,…
A: Center gravity of the system X = m1x1 + m2x2 / m1 + m2 X = 20 x 0 + 12 x 2.5 / 20+12 X = 0.937 m X…
Q: A tightrope walks across a 30-m long wire tied between two poles. The center of the wire is…
A: Recall We would consider the equilibrium of tightrope walker For equilibrium ∑Fx=0∑Fy=0
Q: The 100 kg skier’s knee can withstand a lateral torque of 500 N∙m before dislocating. As the skier…
A: Step 1:Step 2:Step 3:Step 4:
Q: *67. A gymnast does a one-arm handstand. The humerus, which is the upper arm bone (between the elbow…
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Q: A 30 foot ladder weighing 100 lbs having its center of mass one-third of the way up from the bottom…
A: Given: A 30 foot ladder weighing 100 lbs having its center of mass one-third of the way up from…
Q: A uniform 5.0 m long 25 kg plank is to hold two people washing windows on a downtown skyscraper. The…
A: Solution. Let T be the tension in the rope. The plank is stationary. The torque acting on the lack…
Q: magnitude of the torque
A: To find the torque exerted by the beam around the point where it is fixed to the wall, we can use…
Q: An old carpenter’s trick to keep nails from bending when they are pounded into hard materials is to…
A: Given, An old carpenter uses a trick to keep nails from bending is to grip the center of the nail…
Q: What torque is produced by the pole-vaulter's left arm through his centre of gravity What torque is…
A: Given that:FL=1000 NFR=2000 NdL=0.50 mdR=1.5 mW=700 N
Q: What is the torque about your shoulder axis if you hold a 10.0 kg barbell in one hand straight out…
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Q: 7. Tarzan prepares to swing and much to his dismay, gets his loincloth stuck on a branch. He's left…
A: Here, we use the relation between weight and mass of a body to get the weight of Tarzan.
Q: Biomechanically, what is the significance and importance of the center of gravity when performing a…
A: In biomechanics,the center of gravity (COG) is a critical concept, especially in exercises like the…
Q: A man holds a 175-N ball in his hand, with the forearm horizontal (see the drawing). He can support…
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Q: A 94 gm meter stick has two objects attached to it, one of 83 gm at the 14 cm mark and the other of…
A: Given: mass of meter stick, ms = 94 gm = 94 × 10-3 kg , length = 100 cm mass of object 1, m1 = 83 gm…
Q: a woman is standing against a wall. If she keeps the lower half of her body next to the wall explain…
A: A woman is standing against a wall .if she keeps the lower half of her body next to the wall. now…
Q: you stand with your back and heels against a wall, and bend forward at the waist so that your center…
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Q: A window washer is standing on a scaffold supported by a vertical rope at each end. The scaffold…
A: The formula for the tension in the right side of the cable is T2=Ws2+L1LWw Here, Wsis the weight of…
Q: A horizontal 8.0 m long 57 N uniform bar at one end is attached to a wall by a frictionless hinge…
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Q: Why is it more difficult to do a sit-up with your hands behind your head than when your arms are…
A: While doing a sit up to rotate the upper half of the body from a laying down position a torque needs…
Q: A uniform 1.0-N meter stick is suspended horizontally at the middle. A 2.0-N weight is suspended…
A: length of meter stick is 1m Let w1 = 2.0 N r1 = 10 cm from the stick let weight of 500 grams (0.5…
Q: A 50.0 g mass is placed at the 20 cm mark in meterstick as shown in the figure. what is the mass of…
A: hanging mass = 50 g position of hanging mass = 20 cm mark mass of stick = M position of fulcrum =…
Q: A uniform 10.0 m beam of mass 300 kg extends over a ledge, as in Figure. The beam is not attached…
A: A uniform beam of length and massextends over the ledge. The beam is not attached but rests over the…
Q: The 64-kg man with center of mass G supports the 28-kg drum as shown. Find the greatest distance x…
A: The data given is as follows: 1. Mass of man, mm=64 kg 2. Mass of drum, md=28 kg 3. Coefficient of…
Q: A gymnast does a one-arm handstand. The humerus, which is the upper arm bone between the elbow and…
A:
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- Stand with your heels and back against a wall and try to bend over and touch your toes. You’ll find that you have to stand away from the wall to do so without toppling over. Compare the minimum distance of your heels from the wall with the distance for a friend of the opposite sex. Who can touch their toes with their heels nearer to the wall: men or women? On the average and in proportion to height, which sex has the lower center of gravity?QUESTION 11 A 10-m-long plank (of negligible mass) is supported at each end by vertical cables. A person sits on the plank between the cables. The tension in the left cable is 300 N, and in the right cable it is 200 N. How far is the person sitting from the left cable? 300 N 200 N (A) I = 2.0 m 10 m (B) r = 3.0 m (C) x = 4.0 m (D) r= 5.0 m (E) x = 6.0 mWater parks often include a log rolling area, in which participants try to stay upright while balancing on top of floating logs that are free to rotate in the water. If you’ve tried this, you know that the larger the diameter of the log, the easier it is to balance on top. Explain why this is so.
- 4. A wooden board of mass M and length L is hung from the ceiling by two massless wires attached to its two ends. A block of mass m is placed on the board. The two wires are of the same length. (a) the two wires is equal to each other? (b) along the board? (c) other. The thick wire can just sustain the maximum tension in part (b) while the thin wire can only sustain half of it. What is the requirement on the position of the block to avoid breaking the wires? Where is the block placed if it is known that the tension in What is the minimum and maximum of tension in the wires as we move the block Now assume M = 10 kg, m = 15 kg, and that one of the wires is thinner than theYou can find the center of gravity of a long ruler by resting it horizontally on your two index fingers, and then slowly drawing your fingers together. First the ruler will slip on one finger, and then on the other, but eventually the fingers meet at the CG. Why does this workA uniform rod AB of weight 500 N and length 4.0 m is supported at two points P and Q as shown below. AP = QB = 0.80 m. A man of weight 800 N is walking from Q to B. Find the maximum %3D %3D distance x from Q the man can walk before the rod topples about Q. P Q A 1 -| × |- O 0.4 m O 0.8 m O 0.75 m O 0.6 m