Motion & Mechanics

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According to Education.com, the pull of gravity acts more on an object rolling down a ramp inclined at a steeper angle, hence causing it to accelerate and move faster. For Dummies explains that when objects are rolling down an inclined plane such as a ramp, a component of the force of gravity causes it to accelerate downward.

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  • How does a pulley make work easier?

    Q: How does a pulley make work easier?

    A: A pulley makes work easier by redirecting and amplifying force. It helps reverse the direction of an individual’s lifting force. As a user pulls a rope down, the pulley lifts the weight up. When two ropes and wheels are used, a pulley reduces the effort needed to lift a weight by half.
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  • Why can't liquids be compressed?

    Q: Why can't liquids be compressed?

    A: Liquid compression is difficult but not impossible because they feature a mid-level intermolecular force that makes their molecules difficult to compress. Intermolecular force is the strength used to hold molecules tightly together or force them apart. The strength of the intermolecular force depends on the state of the matter, with solids having the strongest intermolecular force and gases having the weakest intermolecular force.
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  • How do you measure the water flow through a pipe?

    Q: How do you measure the water flow through a pipe?

    A: The water flow though a pipe is measured by using a mechanical flow meter. These work through positive displacement, where the volume of water flowing though in a given amount of time is measured. Domestic areas typically use a piston/rotary positive displacement meters or a nutating disk meter, while commercial areas use turbine flow meters.
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  • What was Marconi Guglielmo famous for?

    Q: What was Marconi Guglielmo famous for?

    A: Italian born Guglielmo Marconi was most famous for inventing and transmitting the first wireless signals across the Atlantic Ocean. According to the Nobel Prize Organization, in 1900, Marconi received his famous patent number 7777 for tuned or syntonic telegraphy.
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  • Why do ships float on water?

    Q: Why do ships float on water?

    A: Ships float because they displace enough water for the buoyancy force to be greater than the force of gravity acting on the ship. The displaced water attempts to return to its original position, now occupied by the ship, which pushes the ship up. This effect is known as buoyancy force. The strength of the force of gravity pulling down on the ship is affected by its weight. Whichever of these forces is stronger determines if the ship floats or sinks.
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  • How much force can a person exert?

    Q: How much force can a person exert?

    A: The amount of force a person can exert depends on many variables, including that person's mass, the acceleration being used to exert the force, and the friction, gravity and other forces involved. According to Live Science, researchers found that boxers' punches can generate up to 5,000 newtons of force.
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  • What is a non-Newtonian fluid?

    Q: What is a non-Newtonian fluid?

    A: Non-Newtonian fluids are those that behave differently than Newtonian fluids do with regard to viscosity. Typically, stress causes non-Newtonian fluids to alter their flow patterns or viscosity. The stress can cause the viscosity to increase or decrease, depending on the particular non-Newtonian fluid.
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  • What is a Venturi meter?

    Q: What is a Venturi meter?

    A: A Venturi meter is a flow measurement device, commonly utilized in the water supply industry. A Venturi meter specifically uses a converging section of pipe to increase flow velocity. A corresponding reduction in pressure permits a determination of the flow rate.
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  • How did Isaac Newton die?

    Q: How did Isaac Newton die?

    A: Newton died in his sleep in London, England, on March 31, 1727, at the age 85. On the previous day, after suffering severe pain in his abdomen, Newton blacked out and never regained consciousness.
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  • How do water rockets work?

    Q: How do water rockets work?

    A: A water rocket works because of air pressure that is builds inside a container filled with water, usually a plastic soda bottle, which is released rapidly through an opening as it tries to escape. The reaction of a water rocket is an excellent example of Newton’s third law of motion, which states that forces exist in pairs.
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  • What is gravitational energy?

    Q: What is gravitational energy?

    A: Gravitational energy is the movement of an object or mass that is caused by the pull of gravity. This is caused on Earth by the strong attraction of all other masses to be drawn back to Earth's center. An example of gravitational energy is water from a river tumbling over a cliff to form a waterfall.
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  • Is air considered a fluid?

    Q: Is air considered a fluid?

    A: Air is a fluid because the force needed to deform it depends on how fast it is deformed, not on how much it is deformed. This differs from a solid, where the force needed to deform it remains the same whether it is done quickly or slowly.
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  • What is gravity?

    Q: What is gravity?

    A: Gravity is a type of force that attracts objects to one another. Objects with more mass have more of a gravitational pull than those with less mass. The pull of gravity also depends on the distance between two objects. The farther away an object is, the less gravitational pull it exerts.
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  • When is friction unwanted?

    Q: When is friction unwanted?

    A: Friction is unwanted in any situation in which free and continuous motion of mechanical parts is necessary. Some examples include the moving parts inside of an engine, door hinges and water slides.
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  • What is the definition of hydraulic pressure?

    Q: What is the definition of hydraulic pressure?

    A: The definition of hydraulic pressure is that of a force per unit area that is measured in pounds per square inch (PSI). Dynamic pressure and static pressure are the two pressure components.
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  • How does convection work?

    Q: How does convection work?

    A: Convection works by transferring heat from a hot substance to a cooler one through the motion of one of the substances. For example, as wind passes over a hot substance, heat from the substance transfers to the air particles, cooling the hot substance and slightly warming the air.
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  • What is the Archimedes Principle?

    Q: What is the Archimedes Principle?

    A: The Archimedes Principle (called the law of buoyancy), states any vessel partially or totally submerged in a fluid has an upward force acting upon it that is equal in magnitude to the weight of the fluid displaced by the vessel. The volume of the displaced fluid also equals the volume of the submerged portion of the vessel.
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  • What is gravitational pull?

    Q: What is gravitational pull?

    A: Gravitational pull is the invisible force that causes massive objects to pull other objects towards them. For instance, when a person jumps up in the air, it is the earth’s gravitational pull that causes him to return to the ground. All massive objects have gravity, and the bigger they are, the more gravitational pull they produce.
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  • What are the types of acceleration?

    Q: What are the types of acceleration?

    A: There are three types of acceleration in general: absolute acceleration, negative acceleration and acceleration due to change in direction. Acceleration is defined as the rate of change of velocity.
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  • What are some achievements of Isaac Newton?

    Q: What are some achievements of Isaac Newton?

    A: Some of Sir Isaac Newton's achievements include defining the law of gravity and the three laws of motion, inventing the reflecting telescope, defining theories of light and color and inventing calculus. Newton was a philosopher, mathematician and physicist who played an important role in the scientific Revolution of the 17th century.
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  • What is the definition of input force?

    Q: What is the definition of input force?

    A: Input force is the initial force used to get a machine to begin working. Machines are designed to increase the input force for a larger output force.
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