Physics question and answers for April 22, 2024
- Q A constant torque of 84 N-m applied to a 0.70-kg solid homogeneous disk causes it to rotate about a vertical axis passing through its center, as shown. The diameter of...
- Q 57. (II) A person of mass 75 kg stands at the center of a rotating merry-go-round platform of radius 3.0 m and moment of inertia 820 kg m. The platform...
- Q 22. A solid ball of mass 1.0 kg and radius 10 cm rolls with a forward speed of 10 m/s when it comes to a hill.There is enough friction on...
- Q Two flywheels of negligible mass and different radii are bonded together and rotate about a common axis (see below). The smaller flywheel of radius 30 cm has a cord that...
- Q 6. A force of 75 N is applied to a wrench in a counterclockwise direction at 60 to the handle, 12 cm from the centre of a bolt. a) Calculate...
- Q 21. A hoop with a mass of 2.75 kg is rolling without slipping along a horizontal surface with a speed of 4.5 m/s when it starts down a ramp that...
- Q An 85.5 kg astronaut is training for accelerations that he will experience upon reentry. He is placed in a centrifuge (r = 12.0 m) and spun at a constant angular...
- Q A straight rod of length 'a' is made of an unusual material having mass per unit length u(x)=2x, where is measured from the centre of the rod. The moment of...
- Q The energy E of a rotating object varies directly as the product of its angular mass I and angular velocity w, and inversely as the square of its radius r....
- Q The period of the mathematical pendulum for a small amplitude (use formula for T0) is 3 seconds on Earth. What is the period of this pendulum (the same length) on...
- Q An athlete whirls a 7.17 kg hammer tied to the end of a 1.4 m chain in a simple horizontal circle where you should ignore any vertical deviations. The hammer...
- Q Human centrifuges are used to train military pilots and astronauts in preparation for high-g maneuvers. A trained, fit person wearing a g-suit can withstand accelerations up to about 9g (88.2...
- Q Learning Goal: To understand the meaning of the variables that appear in the equations for rotational kinematics with constant angular acceleration. Rotational motion with a constant nonzero acceleration is not...
- Q IP A ceiling fan is rotating at 1.0 rev/s. When turned off, it slows uniformly to a stop in 2.1 min. Using the result from part A, find the...
- Q Two small balls A and B, each of mass m, are joined rigidly by a light horizontal rod of length L. The rod is clamped at the centre in such...
- Q 1. Verify the equations of rotational motion. Use the value of v from the theory, and time for one case(shape and angle) calculate the final angular velocity Here r is...
- Q A 8.4 N weight is attached 5.8 cm from the fulcrum of a balance beam. What weight should beplaced 4.0 cm away from the fulcrum on the other side of...
- Q When a figure skater makes a jump, he increases his rotation speed by pulling together his arms and legs. This reduces his rotational inertia causing him to spin faster. If...
- Q A physics teacher on a spinning chair has a moment of inertia of 4.2 kg m^2 with his armoutstretched. When he pulls his arms in, his moment of inertia is...
- Q An 82.0 kg-diver stands at the edge of a light 5.00-m diving board, which is supported by two pillars 1.60 m apart, as shown in Figure 11-5. Find the force...
- Q A solid cylinder of mass 10 kg is pivoted about a frictionless axis thought the center O. A rope wrapped around the outer radius R? = 1.0 m, exerts a...
- Q A cable car at a ski resort carries skiers a distance of 7.5 km. The cable which moves the car is driven by a pulley with diameter 4.0 m. Assuming...
- Q To determine the location of the center of mass of a car, the car is driven over a scale. When the front wheels are over the scale, the weight recorded...
- Q A potter's wheel moves uniformly from rest to an angular speed of 0.25 rev/s in 35.0 s.(a) Find its angular acceleration in radians per second per second.(b) Would doubling the...
- Q uniform disc of mass M and radius Ris rotating about its centre of mass (the centre of mass is at rest )with an angular speed w .the angular momentum of...
- Q Suppose you push with a tangential force of 278 N on the rim of a 40.2 Kg merry-go-round with a radius of 2.2 m. Consider the merry-go-round itself to be...
- Q A rod of mass M and length Z can rotate about a hinge at its left end and is initially at rest. A putty ball of mass m, moving with...
- Q A mass of 1.4 kg is located at the end of a very light and rigid rod 73 cm in length. The rod is rotating about an axis at its...
- Q A torque of 45 N m producing a counterclockwise rotation is applied to a wheel about its axle.A frictional torque of 12 N m acts on the axle.(a) What is...
- Q A bicycle wheel is rotationally accelerated at a constant rate of 1.3 rev/s.(a) If it starts from rest, what is its rotational velocity after 3 sec?(b) Through how many revolutions...
- Q A uniform disk with a mass of 8 kg and a radius of 0.4 m is rotating with a rotational velocity of 10 rad/s.(a) What is the rotational inertia of...
- Q Two 0.6 kg masses are located at either end of a 1 m long, very light and rigid rod as in the diagram. (a) What is the rotational inertia of...
- Q A weight of 66 N is located a distance of 15 cm from the fulcrum of a simple balance beam. (a) At what distance from the fulcrum should a weight...
- Q Which of the following is not true about a first class lever?The first class levers change direction of the force.The ideal mechanical advantage is <1, = 1, or >1.The fulcrum...
- Q A string is wrapped around a 6.00-kg cylinder whose radius is45.0 cm. A weight whose mass is 2.00 kg is attached as shown.The weight is released and begins a downward...
- Q A 14.0-kg solid homogeneous disk of radius 0.600 m is rotating with an initial angular speed of 50.0 rad/s about africtionless horizontal shaft. A 6.00-kg solid homogeneous disk of radius...
- Q How the ratio of output force, Fo, to input force, F, is related to the lengths l and lo from the pivot? Ignorefriction and the mass of the lever, and...
- Q (II) A ball of radius r rolls on the inside of a track ofradius R (see Fig. 8-53). If the ball starts from rest at thevertical edge of the track,...
- Q Suppose a disk rotates through sixteen revolutions in 7 seconds.(a) What is the displacement in radians in this time?(b) What is the average rotational velocity in rad/s?
- Q A disk of radius 0.25 m is attached at its edge to a light (massless) wire of length 0.50 m to form a physical pendulum. Assuming small amplitude motion, calculate...
- Q An automobile tire with radius 0.50 meters is rolling with an angular velocity of 4 rad/s start to accelerate with a rate of a = 2.3 m/s. a) What is...
- Q Two children playing on a frictionless garden gate invent a new game called "gate". The idea is that they will get on opposite sides of the gate and each push...
- Q A disk of mass M is spinning freely at 6.99 rad/s when a second identical disk, initially not spinning, is dropped onto it so that their axes coincide. In a...
- Q Each of the following objects has a radius of 0.209 m and a mass of 2.38 kg, and each rotates about an axis through its center (as in this table)...
- Q A 205-kg merry-go-round in the shape of a uniform, solid, horizontal disk of radius 1.50 m is set in motion by wrapping a rope about the rim of the disk...
- Q A dentist's drill starts from rest. After 3.10 s of constant angular acceleration it turns at a rate of 2.00 x 10* rev/min,(a) Find the drill's angular acceleration.rad/s2(b) Determine the...
- Q Given two wheels both of mass 4kg and of radius 0.3m. One has all its mass concentrated in a heavy rim and the other is a un thin flat disc....
- Q A small 290-gram ball on the end of a thin, light rod is rotatedin s horizontal circle of radius 12 mCalculate the moment of inertia of the ball about the...
- Q Formula Based Problem: Two cars get in a head-on perfectly inelastic collision. The first car was travelling to the right at 25m/s and was 1200kg. The second car was going...
- Q An 88 kg fullback moving east with a speed of 5.0 m/s is tackled by a 97 kg opponent running west at 3.0 m/s, and the collision is perfectly inelastic....
- Q The figures above show three stages of a dive performed by an athlete. During the dive, the athlete completes several rotations in midair while traveling from the platform to the...
- Q A manufacturer of CD-ROM drives claims that the player can spin the disc as frequently as 1100 revolutions per minute. If spinning at this rate, what is the speed of...
- Q It takes 2000 Nm of torque to loosen a large bolt. You are only powerful enough to apply 620 N of force to the wrench lever. How long does the...
- Q A disk rotates about an axis through its center. Point A is located on its rim and point B is located exactly one fourth of the way from the center...
- Q A pulley with a radius of 12 inches uses a belt to drive a pulley with a radius of 35 inches. The 12-inch pulley turns through an angle of 270....
- Q If global warming continues, it's likely that some ice from the polar ice caps of the Earth will melt and the water will be distributed closer to the Equator. If...
- Q A vinyl can turn 10.42 times within 3.46 s. If it starts from rest, what is its angular acceleration?Round your answer to 2 decimal places.
- Q 6. A rolling ball will eventually come to rest, even without air resistance, because:a. There is still some friction, even when rollingb. All things naturally come to restc. The ground...
- Q A roller coaster (mass of 350. kg) is released from a height of 85 m on a frictionless track. It encounters a loop the loop (at ground level) with a...
- Q The magnitude of the angular momentum of a 625 g basketball (radius 22.9 cm) spinning at 11 rev/s on an axis through its center of mass is approximately... 0.24 kg...
- Q A disk is free to rotate about a fixed axis at its center. If the angular velocity of the disk as a function of time is given by w =...
- Q A hoop, a spherical shell, a solid sphere, and a hollow cylinder, all with the same mass and same radius are released from rest at the top of an incline....
- Q A thin rod AB of mass M, length 'a' has a variable mass per unit length P0(a+x) / a where x is the distance measured from the end. A and...
- Q At some instant, a particle is moving along a straight line 2x-3y=2 and its co-ordinates on that line are (4,2) Now at another instant the same particle is moving along...
- Q In what type of circuit do electrons follow one path from the source, to a load, and back to the source?a) connected circuitb) short circuitc) parallel circuitd) series circuite) open...
- Q We wrap a light, nonstretching cable around a solid cylinder with radius R and moment of inertia I. The cylinder rotates with negligible friction about a stationary horizontal axis. We...
- Q Which of the following statement is true regarding forced oscillation ? If the driving frequency is greater than the frequency of the system then amplitude of the system will be...
- Q A 2000 kg solid cube with sides that are 30 cm is rotating around an axis through it's center and perpendicular to two parallel faces of the cube. What is...
- Q What is the torque required to spin a sphere of moment of inertia of 2x104 kgm to an angular momentum of 3000 kgm/s in 10 seconds?
- Q It has been suggested that rotating cylinders about 16.0 mi long and 5.63 mi in diameter be placed in space and used as colonies. What angular speed must such a...
- Q A disc of Mass 'M' = 6kg and Radius R = 3m is lying on a horizontal smooth surface free to move. A particle of mass m moving with velocity...
- Q A 240-kg merry-go-round in the shape of a uniform, solid, horizontal disk of radius 1.50 m is set in motion by wrapping a ropeabout the rim of the disk and...
- Q A uniform solid sphere of unit radius is given translational velocity Vo and angular velocity wo and placed on rough surface as shown. If it comes to rest completely after...
- Q A block of ice and a solid uniform sphere, each having the same mass, start from rest at the same height h above the bottom of a hill and move...
- Q A horizontal rod of mass 2 kg and length 1.5 m is free to rotate about a vertical, frictionless axle through its midpoint. Two forces are applied as shown in...
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