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Get college assignment help at uniessay writers A loudspeaker of mass 25.0 {rm kg} is suspended a distance of h = 1.20 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.30 {rm m}.

5-106. A small remote-control car with a mass of 1.60 kg moves at a constant speed of v=12.0 m/s in a vertical circle inside a hollow metal cylinder that has a radius of 5.00m (Fig. 5-69). What is the magnitude of the normal force exerted on the car by the walls of the cylinder at a) point A (at the bottom of the vertical circle)? b) point B (at the top of the vertical circle)?

An electron is accelerated from rest by a potential difference of 310 V. It then enters a uniform magnetic field of magnitude 270 mT with its velocity perpendicular to the field. Calculate the speed of the electron.

A small block with a mass of 0.180 is attached to a cord passing through a hole in a frictionless, horizontal surface (the figure ). The block is originally revolving at a distance of 0.50 from the hole with a speed of 0.70 . The cord is then pulled from below, shortening the radius of the circle in which the block revolves to 0.10 . At this new distance, the speed of the block is observed to be 3.50 . How much work was done by the person who pulled on the cord?

For this patient, his leg (including his foot) is 95.0 long (measured from the hip joint) and has a mass of 14.2 . Its center of mass is 41.0 from the hip joint. A support strap is attached to the patient’s ankle 13.0 from the bottom of his foot. What weight is needed to support the leg horizontally?

48 g tennis ball horizontally from rest to a speed of 35 m/s Assuming that the acceleration is uniform when the racquet is applied over a distance of 0.52 m, what is the magnitude of the force exerted on the ball by the racquet?

A long pole is used to lift a window. If a vertical lift of 85 N is needed to raise the window, what force must be exerted along the pole? Assume the pole makes an angle of 49° with the vertical wall.

At one instant, the center of mass of a system of two particles is located on the x-axis at x = 2.0 {rm{ m}} and has a velocity of (5.0 {rm{ m/s}} ) hat i. One of the particles is at the origin. The other particle has a mass of 0.10 {rm kg} and is at rest on the x-axis at x = 8.0 {rm{ m}}.

Two blocks each of mass 1.7 kg are suspended from the ends of a rigid weightless rod of length l1 = 171.0 cm and l2 = 12.2 cm. The rod is held in the horizontal position shown and then released. Calculate the initial acceleration of the mass attached to l1. Assume up is positive and down is negative

A 350 kg piano slides 3.5 m down a 27 degree incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40. Calculate the force exerted by the man, the work done by the man on the piano, the work done by the friction force, the work done by the force of gravity, and the net work done on the piano.

Get college assignment help at uniessay writers Two blocks each of mass 2.1 kg are suspended from the ends of a rigid weightless rod of length l1 = 126.0 cm and l2 = 6.8 cm. The rod is held in the horizontal position shown and then released. Calculate the initial acceleration of the mass attached to l

If a curve with a radius of 87 is perfectly banked for a car traveling 67 , what must be the coefficient of static friction for a car not to skid when traveling at 84 ?

A 300 air-track glider collides with a spring at one end of the track. The figure (Intro 1 figure) shows the glider’s velocity and the force exerted on the glider by the spring. (Intro 2 figur

An object of mass, m1,is suspended by two thirds connected to a wall and to a 5.0kg block sitting on a table as shown. A coefficient of friction of 0.47 exists between the 5.0kg block and the table. What is the maximum mass, m1, that can be hung from the chords before the 5.0kg mass just begins to move?

A loudspeaker of mass 19.0 is suspended a distance of = 2.00 below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of = 3.30 . What is the tension in each of the cables?

n the figure, a slab of mass m1 = 22 kg rests on a frictionless floor, and a block of mass m2 = 11 kg rests on top of the slab. Between block and slab, the coefficient of static friction is 0.30, and the coefficient of kinetic friction is 0.20. The block is pulled by a horizontal force of magnitude 63 N. What is the acceleration of the slab?

A 0.630-kg ball is dropped from rest at a point 1.55 m above the floor. The ball rebounds straight upward to a height of 0.770 m. What are the magnitude and direction of the impulse of the net force applied to the ball during the collision with the floor? magnitude: kg · m/s direction:

A walkway is supported by pairs of hollow carbon steel pipes, each having an outer di- ameter of 2.68 cm and walls that are 2.05 mm thick. Each pair of pipes supports a section of walkway weighing 1990 N. If the elastic limit for carbon steel is 1.57 × 10^8 Pa , how many people can safely stand on a single section of the walkway? As- sume an average of 430 N/person . Answer in units of people.

Two horizontal forces, 213 N and 140 N, are exerted on a canoe. If the these forces are applied in the same directions, find the net horizontal force on the crate.

A block is pushed against the spring with spring constant 4.8 kN/m and compresses the spring a distance 5.4cm from its equilibrium position. The block starts at rest, is accelerated by the compression spring, and slides across a frictionless track except for a small rough area on a horizontal section ofthe track. It leaves the track horizontally, flies through the air, and subsequently strikes the ground. What is the speed v of the block when it leaves the track?

a train going 40m/s approaches a crossing bell whose frequency is 820 hz

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November 3, 2019