# Physics

• Physics
The wording of this question is a bit confusing. It appears that the question is asking for an explanation of how force and mass are related to each other. That's a part of Newton's second law. The...

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The distance from A to B is the same as the distance for B to A, so you can set up a problem that calculates how long it took to ride that distance at each speed. Once you know that time, you can...

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When power lines are hung they are left with an amount of slack in them, called "sag" in the industry, because the lines expand and contract with heat in their environment as well as with the...

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Not a ballistics expert, but I think I've got your answer!! Or at least I can provide you with a few formulas that relate linear velocity of rotation to the velocity of advance, and account for...

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Work is dot product of force and displacement. A 2.09*10^3 kg car requires 5.7 kJ of work to move from rest to a final speed V. The displacement of the car during this is 23.7 m in the horizontal...

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The worker on the roof of the house drops his 0.83kg hammer, which slides down the roof at constant speed of 8.55m/s. The angle made by the roof with the horizontal is 21 degrees and its lowest...

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John has travelled past the 234 km marker. He stops at the 134 km marker and returns along his path to the 180 km marker. What is his resultant displacement from the 234 km marker? The total...

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The car was initially travelling at 80 km/h. It then accelerates at 12km/h^2 for 22 seconds. 22 seconds is equal to 22/3600 hours. Therefore the speed of the car after the period of acceleration...

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In quantum mechanics the movement (more precisely, the state) of a particle in time is described by Schrodinger's equation, a differential equation involving a wave function, psi(x,t). |psi(x,t)...

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The two speakers produce the loudest sound when the waves of both speakers add with constructive interference. Meaning, when the speakers are 30 cm apart, they are adding the waves thus making the...

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A skier of mass 55 kg slides down a slope 11.7 m long, inclined at an angle to the horizontal. The magnitude of kinetic friction is 41.5 N and air resistance is negligible. The initial speed of...

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The shopper pushes the cart with a force of 15 N. The cart is loaded to make its mass equal to 31 kg. The cart starts from rest. The force applied results in an acceleration given by a =...

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To determine the pelican's initial speed we first need to determine the time that elapsed before the fish hit the water. The fish was dropped from a height of 4.6 m and it only had a horizontal...

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The person is standing on a bathroom scale in an elevator. The bathroom scale is calibrated in newtons. This shows that the reading on the scale is the weight of the person. If the person's mass is...

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A) The figure is below. Initially the bucket and the counterweight are stationary. After the small ball bounces back, it will have the speed -e*u relative to the bucked which will move with the...

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The nucleus of an atom of any element is made up of neutrons and protons. If any number of neutrons and protons could form a stable nucleus the number of elements and their isotopes would be...

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This is a question asked pretty often, especially when we consider the fact that the distance between the nucleus and the electrons is very small. Now, let us take a simple case of a hydrogen atom,...

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Let us first look at what density means; the density of an object is the mass of the object divided by the volume of the object. The density of an object does not change merely by a change in its...

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Using the linear regression from the calculator the quadratic function for this set of data is: f(t) = -15.94t^2 + 110.20 t + 4.87 We find the time when the ball is 6 feet above the ground, thus...

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To calculate the block's mass, first calculate the energy of the system using the formula E=1/2kA^2 , where E is the energy in Joules, k is the spring constant in N/m, and A is the amplitude in...

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From the information given, we have a player of mass 95 kg hanging from the rim of a basket. The behavior of the basket rim can be simplified to that of a spring with a spring constant of 7.4*10^3...

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Work is defined as force through a distance: 1) Work = Force * Distance, or W=fd The cart has a mass of 70 kg, subject to the acceleration of gravity, 9.8 m/sec^2. Force is defined in terms of...

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Yusef pushes the chair of mass 45 kg across a carpeted floor with a force of magnitude 144 N directed 35.0 degrees below the horizontal. The magnitude of the frictional force between the carpet...

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The emission spectrum of a particle is the frequency of radiation given off in the form of electro-magnetic radiation as the particle returns from a higher energy level to a more stable level with...

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When the brakes of the automobile is applied it comes to halt. During this process the mechanical energy of the automobile is converted to heat energy in the brake pads. The automobile weighs 1220...

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A 23.8 g silver ring (cp = 234 J/kg*C) is heated to a temperature of 82.2 C and then placed in a calorimeter containing 5.32*10^-2 kg of water at 24.0 C. The calorimeter is not perfectly insulated...

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Photo voltaic conversion uses the property of some materials that cells are made of which absorb solar radiation and this creates a difference in voltage between different areas of the photo...

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You have not mentioned where the point b is where the charge q = -3.2 nC is placed. For a charge q placed at a distance r from a charge Q, the potential energy is equal to U = kQq/r, where k is the...

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In the stage production of Peter Pan, the 57 kg actress playing Peter has to fly in vertically. The actress is lowered starting from rest, a distance of 3.4 m in 2 s. This is acheived by the use...

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The rock is thrown horizontally from the top of a water tower and it lands 20 m from the base of the tower. It was initially thrown at a horizontal velocity of 10 m/s. There is no acceleration...

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The crate is a cube with sides 1 m and has a mass of 29 kg. It rests on the floor with the coefficient of static friction between the floor and the crate being 0.53. A horizontal force is being...

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The projectile motion can be represented as: vf^(2) - vi^(2) = -2gy and vf = vi -g t where vf = final velocity vi = initial velocity = 98m/s g = acceleration due to gravity = 9.8 (m)/(s^(2))...

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The projectile is fired with a velocity of magnitude 90m/s at angle 45 degree to the horizontal. We can divide the initial velocity into a horizontal component of 90 sin 45 = 90/sqrt 2 and a...

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There is a block of ice weighing 8.2 kg placed on the ramp. Let the angle between the ramp and the horizontal be X. The gravitational force of attraction between the Earth and the block accelerates...

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An electromagnet is formed because of the relationship between electricity and magnetism. When an electric field is in motion, a magnetic field is induced. (Vice versa, when a magnetic field is in...

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For all of these questions, you need to use the following equation, which will tell you the force of gravity in those situations: Fg = (Gm1m2)/r^2 where G is the universal gravitational constant,...

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For water the total length submerged is L_1=10-2 =8cm. For the second liquid, the total length submerged is L_2 =10-4 =6 cm . The hydrometer works on Archimedes principle, so that the buoyant...

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The sleigh has to be kept moving at a constant velocity. This is possible if the force applied by the man who is pulling the sleigh is equal to the force due to friction in the opposite direction....

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A ball is dropped from the top of the building that is 80 m tall. Use the formula: s = u*t + (1/2)*a*t^2 where s is the distance traveled in time t, a is the rate of acceleration and u is the...

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The weight of the object in air is 306 N. Its mass is 31.22 kg. Its weight when it is immersed in water is 227 N. When it is immersed in an oil the weight decreases to 260 N. To determine the...

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A bullet with a mass 8 g is fired into a 2.5 kg pendulum bob initially at rest. It sticks to the bob and as a result the bob rises a vertical distance of 6 cm. Use the law of conservation of...

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A 5.00-kg block is set into motion up an inclined plane with an initial speed of 8.00 m/s. The block comes to rest after traveling 3.00 m along the plane, which is inclined at an angle of 30...

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A 28.0 kg crate is initially moving with a velocity that has magnitude 3.67 m/s in a direction 37.0 degrees west of north. The components of the velocity of the crate is 3.67*sin 37 towards the...

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The sum of the kinetic energy and potential energy in a system is a constant. Only the form of the energy changes. For a spring with a spring constant of 30 N/m, the energy stored is equal to...

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If we were to treat the cart as an isolated system, the law of conservation of energy states that the total energy in the system remains the same. Assuming an absence of friction, as the cart rolls...

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There are many types of pressure in everyday life. The measurements made to determine this type of pressure are usually related to ambient air pressure. There are some measurements made in...

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The two speakers produce the loudest sound when the waves of both speakers add with constructive interference. Meaning, when the speakers are 30 cm apart, they are adding the waves thus making the...

• Physics
An object would in the absence of a force continue to move in a straight line. If an object has to move in a circular path a force is required to pull it towards the center and make it move in a...