A person of mass 50 kg stands on a weighing scale on a lift. If the lift is descending with a downward acceleration of 9 m s–2, what would be the reading of the weighing scale? (g = 10 m s–2 ... (d) a car moving with a constant velocity of 30 km h _1 on a rough road, (e) a high-speed electron in space far from all material objects, and free of electric and magnetic fields. Answer: (a) Since the drop of rain is falling downward with a constant speed, so the acceleration of the rain drop is zero. Hence according to Newton’s first law ...
Suppose that the equipment required to obtain take-off velocity (i.e., a force platform or video camera) was not available but that the time that the person spent in the air was able to be recorded using (e.g., a jump mat); and was 0.489 sec. Assuming that the time the c of m spent rising the instant after take-off was the same as the time that ...

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What minimum force, F, will keep the block from slipping? (A) F = mg (B) F = mg (C) F = mg/ (D) F = mg(1 – ) 25. Two blocks of masses M and m, with M > m, are connected by a light string. The string passes over a frictionless pulley of negligible mass so that the blocks hang vertically. The blocks are then released from rest.

(a) What minimum coefficient of friction between a rider's clothing and the wall is needed to keep the rider from slipping? (b) Be sure the coefficient of friction makes sense.
Oct 04, 2020 · The person of most ordinary mathematical attainments will realize that to locate a point in a plane we must have two measurements; and we could probably show this person, without too serious difficulty, that we can locate a point in any surface by two measurements. An example of this is the location of points on the earth’s surface by means ...

It is common experience that force needed to set an object into motion is larger than the force needed to keep it moving at constant velocity. For this reason the maximum force of statU:.frlettott fJmax} between a pafr Of stDf- in contact will be larger than the force of kinetfe friction f. between them. Fig. 3.5 shoWs'the variation of lhe ...
The terminal velocity of a person falling in air depends upon the weight and the area of the person facing the fluid. Find the terminal velocity (in meters per second and kilometers per hour) of an 80.0-kg skydiver falling in a pike (headfirst) position with a surface area of $0.140\,{\text{m}}^{2}$.

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(D) velocity of 16 m/s and has traveled 160 m. (E) velocity of 16 m/s and has traveled 320 m. 85. When a falling object reaches terminal velocity, it (A) is no longer subject to the friction of air (B) moves downward with constant velocity. (C) has an acceleration of approximately 10 m/s2 (D) has no downward velocity. (E) has an upward ...
lar velocity of the sprocket wheel is 1 rad/s, what is the angular velocity of the gear? 45 mm 120 mm Solution: The key is that the tangential accelerations and tangen-tial velocities along the chain are of constant magnitude (a) θ B = 2.67 rev (b) v B = rω B v A = r Aω A v A = v B v B = (0.045)ω B v A = (0.120)(1) ω B = 120 45 rad/s = 2 ...

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Why do you need penny to help you brew a sleeping draught? Best answers for Convince Andre to Revise. What is the incantation for the snake-vanishing spell? What are the answers to penny's potion quiz? What are Nettles known for? Touching the trunk of a Wiggentree protects you from what?
By solving for velocity and, for this specific problem, 2.2 m/s 5) Matt, with a mass of 23.0 kg, is swinging on a tire swing (a tire attached to a rope hanging from a tree). The tire itself has a mass of 5.0 kg, and the rope has a length of 4.00 m. Use g = 10 m/s2. Matt’s speed is 3.00 m/s when the tire reaches the bottom of its circular arc,

Tangential acceleration a t is directly related to the angular acceleration α and is linked to an increase or decrease in the velocity, but not its direction. Figure 3. Centripetal acceleration a c occurs as the direction of velocity changes; it is perpendicular to the circular motion.
The semi-major axis is the average of the planet's maximum and minimum distances from the sun. Let the earth's mean radius be R 1. Now, if the earth's orbital momentum were suddenly reduced (without exerting anything but a tangential stopping force on the earth), it would fall straight to the sun.

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Apparatus and methods are disclosed for simultaneously tracking multiple finger and palm contacts as hands approach, touch, and slide across a proximity-sensing, compliant, and flexible multi-touch surface.
else? 3. Who was the last person to ask to have a quick word with you? 4. What have you heard on the grapevine recently? ⟹ In groups, talk about current trends in communication. We are also constantly dropping clues about what is going on in our head, sometimes without even knowing.

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When the turntable is turned on and rotates at 45.0 rev/min, calculate the centripetal force needed to keep the fly from slipping? 3. A 35.0 kg boy is swinging on a rope 7.00 m long. He passes through the lowest position with a speed of 3.00 m/s. What is the tension on the rope at that moment? 4. The earth orbits the sun in 365 days.

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36. A 25.0-kg block is initially at rest on a horizontal surface. A horizontal force of 75.0 N is required to set the block in motion. After it is in motion, a horizontal force of 60.0 N is required to keep the block moving with constant speed. Find the coefficients of static and kinetic friction from this information. 37.
Nov 04, 2015 · If you use a horizontal force of 30.0 N to slide a 12.0 kg wooden crate across a ﬂoor at a constant velocity, what is the coefficient of friction between the crate and the floor?

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Jul 12, 2012 · At the instant the elevator has a downward acceleration of 1.0 m/s2 and an upward velocity of 3.0 m/s, the scale reads approximately (A) 350 N (B) 450 N (C) 500 N (D) 550 N (E) 650 N 55.
Tangential acceleration a t is directly related to the angular acceleration α and is linked to an increase or decrease in the velocity, but not its direction. Figure 10.5 Centripetal acceleration ac occurs as the direction of velocity changes; it is perpendicular to the circular motion.

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The mass is 20 kg, and the person has a velocity of 2 m/s down the hill when they're at the top. How fast is the person traveling at the bottom of the hill? All we have to worry about is the kinetic energy and the gravitational potential energy; when we add these up at the top and bottom they should be the same, because mechanical energy is ...
The minimum force needed to push that refrigerator up the ramp has a magnitude F push, and it has to counter the component of the weight of the refrigerator acting along the ramp and the force due to friction. The first step in this problem is to resolve the weight of the refrigerator into components parallel and perpendicular to the ramp.

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If you want to grow into a stronger and happier person, you must grow through these 6 challenges in life. It can feel abrupt and disruptive. However, loss gives you the opportunity to reflect on what is truly important so that you to keep moving forward.
Average Speed 01 02:02, basic, numeric, &gt; 1 min, normal. A person takes a trip, driving with a constant speed 89.5 km/h except for a 22 min rest stop. If the person's average speed is 77.8 km/h, how far is the trip? Average Velocity 01 02:02, basic, numeric, &gt; 1 min, normal. Part 1 of 2 After 12.5 s, a jogger's displacement is 400 m.

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Paul: I don't know how I'd feel about keeping animals in captivity just for kind of human enjoyment. However, I did spend some time in Australia, and that was working with fruit bats. So, I think there is a certain good way or certain benefit that we can offer to animals by keeping them in captivity.
Next, you need to determine why the person you're dealing with feels angry. Use effective questioning techniques. method to get to the root cause of her anger. Encourage her to explain why she feels angry, don't interrupt her while she speaks, and keep on asking questions until she's fully explained...

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A 50.0 kg person is standing on a frozen pond 15 m away from its shore. The person throws a 10.0 kg stone in the direction opposite the shore at a speed of 3.0 m/s. The pond is horizontal and frictionless. The time the person will take to reach the shore is: