Solved Problems in Basic Physics

Parabolic motion, work and kinetic energy, linear momentum, linear and angular motion – problems and solutions

1. A ball is thrown from the top of a building with an initial speed of 8 m/s at an angle of 20o below the horizontal. The ball hits the ground 3 seconds later. a) How far from the bottom of building the ball touches the ground b) How high is the ball thrown from …

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Simple harmonic motion – problems and solutions

1. An object vibrates with a frequency of 5 Hz to rightward and leftward. The object moves from equilibrium point to the maximum displacement at rightward. Determine the time interval required to reach to the maximum displacement at rightward eleven times. A. 2.05 B. 2.20 C. 2.25 D. 2.50 Known : Frequency (f) = the …

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Simple pendulum – problems and solutions

1. Two simple pendulums are in two different places. The length of the second pendulum is 0.4 times the length of the first pendulum, and the acceleration of gravity experienced by the second pendulum is 0.9 times the acceleration of gravity experienced by the first pendulum. Determine the comparison of the frequency of the first …

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Newton’s first law of motion – problems and solutions

1. A person is in an elevator that moving upward at a constant velocity. The weight of the person is 800 N. Immediately the elevator rope is broke, so the elevator falls. Determine the normal force acted by elevator’s floor to the person just before and after the elevator’s rope broke. A. 800 N and …

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The International System of Units, Unit Prefixes – problems and solutions

The International System of Units 1. Which of the following units is not a unit of length A. Mil B. Foot C. Inch D. Knot Solution : Mil, foot, and inch are units of length. The knot is unit of velocity or speed. The correct answer is D. 2. Determine the unit of the international …

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