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A particle vibrates according to the equation x=20 cos 16t, where x is in centimeters. Find its amplitude, frequency, and position at exactly t=0 s.
A rock is dropped from rest into a well. The sound of the splash is heard 2.40 s after the rock is released from rest.
A secret communist spacecraft is observed approaching earth at 0.500c along a straight line from mars to earth.
A runner accelerates to a velocity of 4.15 m/s due west in 1.50 s. His average acceleration is 0.640 m/s2, also directed due west.
If its acceleration is constant, how fast (in mi/h) should this car be traveling after 0.250 miles of acceleration?
The weight of a book was measured using a scale. The scale showed 15N. Next, the book and the scale were placed in an elevator.
In Mostar, Bosnia, the ultimate test of a young man's courage was to jump off a 400 year old bridge (now destroyed) into the River Neretva.
The drawing shows three particles far away from any other objects and located on a straight line.
This chain is of uniform strength, but at any point it can support a maximum tension no greater than 3.00 times its weight without breaking.
The force exerted on a 0.140 kg baseball by a bat changes from 0.0 N to 1.0 X 10^4 N over 0.0010 s, then drops back to zero in the same amount of time.
An automobile with a mass of 100 kg is moving north on a level highway with a constant velocity of 80 km/h.
What average force would be felt by the individual holding the gun for the time the bullet accelerates along the length of the barrel?
How is this change related to the work done by the applied force and the frictional force? How is this change related to the work done by the net force?
If the initial horizontal velocity is 28.0 m/s, what angle (in degrees above the horizontal) did the arrow have when it was shot?
Could the elevator accelerate in such a way that the toolbox will not accelerate along the metal surface at all?
A force F acts to the right on a 5.32 kg block.A 2.44 kg block is stacked on top of the 5.32 kgblock and can slide on it with a coefficient of friction.
Two concentric spherical shells with a point charge q at the center. A total charge of Qin=+20 ?C is placed on the inner shell and a total charge.
Three objects are connected on an inclined table as shown in the diagram below. The objects have masses 8.0 kg, 4.0 kg and 2.0 kg.
Could acceleration also be "how fast something gets slower"? What do you think of this question as it applies to the slope you calculated?
If the acceleration is assumed to be constant, how long does it take the bullet to travel the length of the barrel?
Compare your results with the accepted values for Lunar and Martian gravity (Google "Gravity on other planets.")
What are the scientific principles that allow archaeologists to date charcoal, bone, or other organic materials that they find in archaeological contexts?
Find the magnitude of the car's average acceleration after it has completed one-fourth of the circle.
A 50 kg cannon shell is subjected to a constant acceleration of 1200 g while in the cannon barrel. What force is the burning propellant exerting on the shell?
The masses in the table are in kg, but the input data are in grams, so make the necessary conversions. The first row has been completed for you.