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Q: Why do some people wear bifocal or trifocal eyeglasses?

A: Bifocals and trifocals lenses are using two or three lens power to restore the full range of vision....

Q: During a rugby game two players are running toward each other. One has a mass of 88.1 kg and the oth...

A: Given,

Q: A block of mass M rests on an incline plane. The coefficient of static friction between the plane an...

A: The free body diagram is given below:

Q: A uniform disk with a radius R swings without friction about a perpendicular axis on the rim. If it ...

A:

Q: A ball of mass mb=2.9 kg is attached to a stick by two strings as shown. String 1 is the upper strin...

A: The free body diagram of the system is shown below

Q: Problem 2.51 9 of 13 Review Constan The minimum stopping distance for a car traveling at a speed of ...

A: The car covered a distance 60m with a speed 30m/s. The reaction time of the driver is 0.680s.The dis...

Q: 1) Which has more potential energy? An 8 kg bowling ball at 12.3m or a 0.3kg tennis ball at 289.0m. ...

A: The potential energy of first object,

Q: A transformer has 300 turns on its secondary and 100 turns on its primary. The primary is connected ...

A: (a). the output voltage in the secondary coil is

Q: 04 0 04 0 5 0 5 10 15 20 15 1 (s) 10 5 10 15 20 Exercises 3-10: For each situation: Draw a before-an...

A: 3) Consider the FBD below,

Q: A UCI student is running at her top speed of 5.1 m/s to catch a Shuttle bus, which is stopped at the...

A:  Given:Speed of the student = 5.1 m/sAcceleration of the bus = 0.163 m/s2Distance between the studen...

Q: Question 9 A neutral metal sphere is touched to an identical sphere carrying a charge of +3.0 x 102 ...

A: When a charged conducting body is allowed to be in contact with another neutral conducting body, Cha...

Q: Determine the minimum velocity(m/s)  necessary to orbit freely about a planet or moon at an altitude...

A: The minimum velocity required to orbit freely is,

Q: A vehicle engine slows down from 3300 rpm to 1100rpm in 2.5s. What is the angular acceleration? a. ...

A: Given

Q: A wooden plank is 5.00 m long and supports a 75.0 kg block 2.00 m from one end. If the plank is unif...

A: The net torque on equilibrium is zero.

Q: A 804000ˍkg space ship has completed two thirds of its journey from the Earth to the Moon. At this p...

A: The expression for the required force is,

Q: A shower head has 20 circular openings, each with radius 1.0 mm . The shower head is connected to a ...

A: Given

Q: A completely inelastic collision occurs between two balls of wet putty that move directly toward eac...

A: From the conservation of momentum.

Q: N3T.1 An object's x-velocity v,(t) is shown in the boxed graph at the top left. Which of the other g...

A: Now, consider the velocity verses time diagram. In the diagram complete motion is in two part, the f...

Q: Some bacteria are propelled by motors that spin hair-like flagella. A typical bacterial motor turnin...

A: Consider the angular speed of the bacterial motor be ω0, the angular speed of the rim of the bacteri...

Q: Starting from rest, a disk rotates about its central axis with constant angular acceleration. In 9.0...

A: Given:In 9 seconds a disc rotates 34.2 radians.

Q: (Work and Energy) Two students are pushing identical crates across a frictionless floor. The crates ...

A: Given:Mass of crate of Bing = m1Velocity of crate of Bing = v1 Force applied  F1=19NMass of the crat...

Q: CHAPTER 9 9-7 Work and Kinetic Energy 9.4 Restoring Forces and the Work Done by a Spring 19. A sprin...

A: Part A:Yes,The given spring obeys Hook’s law because the tension induced in the spring  is linearly ...

Q: A quartz crystal vibrates with a frequency of 63,621 Hz. What is the period of the crystal's motion?

A: The expression for the time period is,

Q: A figure skater is spinning with an angular velocity of +16.5 rad/s. She then comes to a stop over a...

A: (a) Average angular acceleration is,

Q: A uniform meterstick is in static rotational equilibrium when a mass of 220 g is suspended from the ...

A: Given,

Q: Find the current in the 5 ohms resistor.

A: Diagram

Q: A 7700-kg boxcar traveling at 14 m/s strikes a second boxcar at rest. The two stick together and mov...

A: Given:Velocity of first boxcar = 14 m/sMass of the first boxcar = 7700 kgVelocity of both boxcar tog...

Q: Charge q1 is -7.97 μC, and charge q2 is 2.83 μC.  How far apart must the two charges be if the force...

A: The magnitude of the force is

Q: The eye of a hurricane passes over Grand Bahama Island in a direction 60.0° north of west with a spe...

A:  Given:Total time = 4.90 hFor AB:Speed, v1 = 42 km/hTime taken, t1 = 3 hFor BC:Speed, v2 = 22 km/hTi...

Q: Problem 2. You slide down a long slide at an amusement park. If you start from rest at the top and c...

A: Given,

Q: Week 4 Fall 2019 Problem 2.73 < 10 of 13 Review Constants A rocket is launched straight up with cons...

A: Given information:The time after which the bolt hits the ground (t) = 6.10 sThe time till which the ...

Q: N2T.10 The drawing below is supposed to be a free-body diagram of a box that sits without slipping o...

A: From the given condition for the motion of truck, there are the forces acting on the box are as, the...

Q: How do you conceptualize getting at root of question that asks how long should you make a pendulum s...

A: Given,

Q: A cup with 1.25 kg of ice is at -10 celsius is heated until all the ice melts. How much energy was a...

A: Given,

Q: 27.1        A particle with a charge of −1.24 x 10−8 C is moving with instantaneous velocity v = (4....

A: Since the cross product for the unit vector notation is,

Q: If A=3i+7k and B= -1+2j+k. What is the angle between vectors A and B ?

A: The dot product of the two vectors can be calculated as,

Q: One boy standing on a bridge throws a stone horizontally at a velocity of 12m/s. If the bridge is 10...

A: During the motion, there is no horizontal component of acceleration and vertical component is the gr...

Q: a roller coaster track is in the shape of the parabola y= 80 -(x^2/20), where the lengths are in met...

A: The vertical position causes the potential energy of the coaster car. Therefore, from conservation o...

Q: If the velocity of an object doubles, how does this affect the Kinetic energy of the object?

A: Write the expression for the kinetic energy of an object.

Q: **22. Three children are standing together on a totally frictionless pond. At the count of three, th...

A:

Q: Given a mass m1 resting on a frictionless surface, connected via a pulley to a hanging mass m2 in a ...

A: Given information:Mass of the object resting on the frictionless surface = m1Mass of the object hang...

Q: As shown in the figure, a given force is applied to a rod in several different ways. In which case i...

A: The required torques for the given figures is,

Q: The figure shows a uniform, 3.0-T magnetic field that is normal to the plane of a conducting, circul...

A:

Q: A block of mass m1=2.4kg is connected to a second block of mass m2=1.8kg. When the blocks are releas...

A: Given information:m1 =2.4kgm2 =1.8kgdistance moved by the masses, d = 0.5 mkinetic friction between ...

Q: Calculate the final velocities of the gliders from the v1i and v2i you measured with error using the...

A: The final velocity of the bumber is,Substitute the values,

Q: A 2.0 kg rock is pressed up a distance ∆x = 20 cm against a spring with spring constant 400 N/m and ...

A: (a)Scene AThe potential energy due to gravity is,Substitute the values,

Q: A motorcyclist is traveling along a road and accelerates for 6.94 s to pass another cyclist. The ang...

A: Given:Angular acceleration = 8.39 rad/s2Final angular velocity = 80.6 rad/sTime taken = 6.94 s

Q: Two small 0.15-kg masses are attached to opposite ends of a very lightweight rigid rod 0.7 m long. T...

A: The velocity of the system.The radius of the circle,

Q: A locomotive of mass m= 1.134 × 10 kg uses 37.8 kW of power to accelerate at a constant rate for 15....

A: Let v be the velocity of the locomotive after 15 s, u be the initial velocity, F be the force, m be ...

Q: In determining which has the longer period, an oscillator with a frequency of 200 Hz or one with f =...

A: The relation between time period and oscillation is,

Rotational Equilibrium And Rotational Dynamics

In physics, the state of balance between the forces and the dynamics of motion is called the equilibrium state. The balance between various forces acting on a system in a rotational motion is called rotational equilibrium or rotational dynamics. 

Equilibrium of Forces

The tension created on one body during push or pull is known as force.