The fan blade below is slowing down. What are the signs of a and w? O w is positive and a is positive. O w is positive and a is negative. O w is negative and a is positive. O w is negative and a is negative.

Q: A spaceship which is 205 m long as seen by an astronaut on board, moves relative to the Earth at…

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Q: You pull a 40.0 kg box through a rope across the floor at a constant speed. The magnitude of your…

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Q: It takes 5.50 J of work to compress a spring 5.70 cm. What is the force constant of the spring? =…

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Q: F₁ d₁ C fssss d3 d₂ F₂

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Q: 1. Boxing gloves are padded to lessen the force of a blow. The glove and face compress 7.5000 cm…

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Q: In the figure, a 499 kg construction bucket is suspended by a cable A that is attached at O to two…

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Q: A girl attaches a rock to a string, which she then swings counter-clockwise in a horizontal circle.…

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Q: In Paul Hewitt's book, he poses this question: "If the forces that act on a bullet and the recoiling…

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Q: The figure shows two blocks, released from rest, connected by a light string passing without…

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Q: How high will an object launched upward travel if its initial velocity was 15.0 m/s?

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Q: light wave in air enters a substance in which light travels at 2.64×108 m/s at an angle of 48o to…

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Q: An object has a mass of 200kg initially moving along a horizontal surface with a velocity if 15ms is…

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Q: Find the height of a column of water where the pressure at the bottom is 115 k

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Q: a. If the ball is released from rest at a height of 0.61 m above the bottom of the track on the…

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Q: A 2.3-kg Rocket traveling at 6.1 m/s collides head-on with a 3.5-kg object traveling in the opposite…

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Q: An unpolarized beam of light with intensity of 49.6 W/m2 passes through a polarizer with a vertical…

A: As we know that when Unpolarized light passes through any polarizer then its intensity becomes half.

Q: A ferris wheel is 50 meters in diameter and boarded from a platform that is 4 meters above the…

A: This is a case of sinusoidal variation since you are dealing with a linear distance in the vertical…

Q: What type of laser and wavelength is used for the Optical Tweezer application?

A: Introduction:-  Optical Tweezer A non-invasive method for handling microscopic-sized particles is…

Q: Military rifles have a mechanism for reducing the recoil forces of the gun on the person firing it.…

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Q: 10. A 15-W compact fluorescent light bulb is used in a lamp plugged into a 120-V wall socket. You…

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Q: A sled plus passenger with total mass 58 kg is pulled by an applied force 15 m across the snow (k =…

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Q: A series AC circuit contains a resistor, an inductor of 230 mH, a capacitor of 4.60 μF, and a source…

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Q: If a dentist's chair weighs 1600 N and is raised by a large piston with cross sectional area 75.0…

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Q: A proton moves with a velocity of ?⃗ =(2?̂−4?̂+?̂) m/s in a region in which the magnetic field is…

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Q: Answer A and B for question 2 2. An object was a mass of 10.0 kg is at rest at the top of a…

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Q: Consider a stick 1.00 m long and its moments of inertia about axes perpendicular to the stick's…

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Q: Measure the mass of the aluminum "unknown using the torque apparatus, and the volume using the…

A: Density = Mass/volume               = Mass /πr2h               = m/( πd2/4h)                =…

Q: You ride your bike 12 miles and then get a flat tire. You turn around walk the bike 4 miles before a…

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Q: Why is the j-unit vector component negative?

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Q: A car of mass M = 1000 kg traveling at 45.0 km/hour enters a banked turn covered with ice. The road…

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Q: A coil of copper wire has a length of 10 m. The cross sectional area of the wire is 0.2 mm2. Note:…

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Q: hree dogs are fighting over a bone. One is pulling to the left with a force of 20N, another to the…

A: Given: The forces on the bone are 20 N left, 35 N right, and 15 N in the upward direction.

Q: The quarter ring shown has a mass m and was cut from a thin, uniform plate. Knowing that r₁ = r2,…

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Q: 4. ABCD is a square of side V2m. Charges of +5√2 nC, +10 nC and -5V2 nC are placed at corners A, B…

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Q: Located in Southern France, the Millau Viaduct is the tallest bridge in the world.  The highest…

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Q: When an inductor is connected to a 60.0 Hz source it has an inductive reactance of 50.2 0. Determine…

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Q: A ship of mass 4.5 x 100 kg starts from rest under the force a constant propeller with a thrust of…

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Q: Monochromatic light falls on a screen 1.70 m from two slits separated by 2.06 mm. The first- and…

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Q: A person of mass 70 kg stands at the center of a rotating merry-go-round platform of radius 3.3 m…

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Q: 1. What is the acceleration of a rock thrown straight upward on the way up? At the top of its…

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Q: A parachutist is falling with speed of 55 m/s when his parachute opens. If the air resistance O a.…

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Q: Imagine we have created layers of ice on the surface of a platform and then propped it up at  an…

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Q: A 1100 kg car travels at 18 m/s before it applies -850 N of force to the ground over 170 m. What…

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Q: If a planet's distance is 1AU from a black hole, what is the mass of the black hole with a…

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Q: A man standing 1.50 m in front of a shaving mirror produces an inverted image 21.4 cm in front of…

A: u=-1.5 mv=-0.214 m-ve because as both lies in front of mirror

Q: KE₁ O yes A 70.0000-kg skier with an initial speed of 10.0000 m/s coasts up a 2.5000-m-high rise as…

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Q: A current of 4.25 A is going through a 7.5 mH inductor is switched off. It takes 8.09 ms for the…

A: Given: The current in the inductor is 4.25 A. The inductance of the inductor is 7.5 mH. The time…

Q: In the figure, a square piece of wood is pivoted at its center. Each of the forces A, B, C, and D…

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Q: 70. A Two positively charged spheres are shown in Figure P24.70. Sphere 1 has twice as much charge…

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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.