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Getting Torqued

Water moves through a turbine in a dam, causing it to turn. The force of the water is 300 N, and the radius of the wheel is 20 m. What is the torque around the center of the wheel?

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Electric Potential

Which of the following statements regarding electric current is true?

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Acceleration Expression

Which expression gives the acceleration of a 1kg mass on a frictionless inclined plane at 30o to the horizon, given that g = 9.8 m/s2?

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Kinetic Energy of a Race Car

What happens to the kinetic energy of a race car if its speed is tripled?

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Don’t Weigh Yourself Down


In which situation would a person would weigh the most?

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Tilt Table

A tilt table test is used to verify if a patient has low pressure drops associated with syncope. The heart, of a horizontal patient, pumps blood at a mean arterial pressure of 90 mmHg (12 kPa). The patient faints as soon as the tilt table goes vertical, this means the blood acceleration equal the gravitational acceleration. If the heart rate does not increase to compensate for the change in angle, at what angle would the blood be pumping one half its horizontal pressure.

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Coulomb’s Law Equivalent

The constant k, which appears in the equation for Coulomb’s law, is equivalent dimensionally to which of the following?

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Magnitude of the Force

Consider the following diagram which reveals a positive test charge that is located between two charged spheres, X and Y. Sphere X has a charge of +3Q and is located 0.6 meters from the test charge. Sphere Y has a charge of -3Q and is located 0.3 meters from the test charge.

If the magnitude of the force on the test charge due to sphere X is F, what is the magnitude of the force on the test charge due to sphere Y?

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Electric Charge

Three metal spheres X, Y and Z, are identical in size but carry differing electric charges of –Q, +2Q and -3Q, respectively. The first metal sphere X is brought into contact only with the sphere Y, and then X is brought into contact only with sphere Z. After X makes contact with spheres Y and Z, in the order described, the charge on sphere X is most consistent with which of the following?

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Direction of Magnetic Force

The direction of the magnetic force on a current carrying wire located in an external magnetic field is which of the following?

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