Physics Kinematics and Dynamics Quiz

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Questions and Answers

A baseball is thrown at an angle of 30 degrees from level ground with an initial velocity of 100 m/s. How far will the baseball travel horizontally before it returns to the same level?

  • 883 m (correct)
  • 983 m
  • 950 m
  • 850 m

A golf ball is driven horizontally from an elevated tee at 80 ft/sec. If it strikes the fairway 2.5 seconds later, what is the magnitude of the ball's resultant velocity just before it hits the ground?

  • 100 ft/sec
  • 90 ft/sec
  • 113 ft/sec
  • 115 ft/sec (correct)

A ball is whirled in a horizontal circle of radius 1.5 ft, completing one revolution every 2 seconds. What is the ball's centripetal acceleration?

  • 14.7 ft/sec² (correct)
  • 1.33 ft/sec²
  • 17.4 ft/sec²
  • 3.13 ft/sec²

A simple pendulum 150.3 cm long makes 100 vibrations in 246.7 seconds. What is the acceleration due to gravity at that location?

<p>9.81 m/sec² (D)</p> Signup and view all the answers

A plumb-bob on a 38-inch cord has a period of 2 seconds on Earth. An identical experiment on the moon, where gravity is 1/6th of Earth, will have what observed period?

<p>4.9 sec (A)</p> Signup and view all the answers

What is the length of a simple pendulum, in meters, if its period is 2 seconds?

<p>0.994 m (C)</p> Signup and view all the answers

An empty truck of 2000 kg has a maximum acceleration of 1 m/sec². What is its maximum acceleration when carrying a 1 metric ton (1000 kg) load?

<p>0.667 m/sec² (B)</p> Signup and view all the answers

An elevator weighing 3200 lbs is rising with an upward acceleration of 4 ft/sec². What is the tension in the supporting cable?

<p>3600 lbs (D)</p> Signup and view all the answers

An elevator moves 2 m in the first 0.6 seconds with constant upward acceleration starting from rest. A 3 kg package is held by a vertical string. What tension does the string exert during the acceleration?

<p>26.7 N (C)</p> Signup and view all the answers

A 3 lb weight is attached to a spring with a spring constant of 25 lb/ft. If displaced slightly and released, what frequency will the weight vibrate at?

<p>2.61 Hz (D)</p> Signup and view all the answers

Flashcards

Range of a projectile

The horizontal distance traveled by a projectile before it returns to its original height.

Time of flight

The time it takes for a projectile to complete its trajectory and return to its initial height.

Centripetal acceleration

The acceleration that acts on an object moving in a circular path, directed towards the center of the circle.

Period of a pendulum

The time it takes for a complete oscillation of a pendulum.

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Period of a spring-mass system

The length of time for one complete oscillation of a mass-spring system.

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Spring constant

The force required to stretch or compress a spring by a unit length.

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Drag force

The force that opposes the motion of an object through a fluid (like air or water).

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Net force

The force required to accelerate a mass by a certain amount.

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Acceleration

The rate at which velocity changes with time.

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Mass

The amount of matter in an object.

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