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Newton's Laws

Angle at which Compressive Force Becomes Zero

*Please see attachment for diagram. Question: The ball has a weight of 15 lb and is fixed to a rod having a negligible mass. If it is released from rest when theta = 0 deg., determine the angle theta at which the compressive force in the rod becomes zero.

Propulsive force of large caliber aircraft gun used by German Air Force in WW2

The largest caliber aircraft gun operated by German Air Force in WW2 was the 12.8cm flak 40. The weapon fired a 25.8kg shell with a muzzle speed of 880m/s. What propulsive force was necessary to attain the muzzle speed within the 6.00m barrel (assume the shell moves horizontally w/consistant acceleration and neglect friction).

Two springs have one end fixed on opposite sides of the box

SEE ATTACHMENT #1 for a diagram of initial and final conditions. In a box with vertical sides, two springs have one end fixed on opposite sides of the box. The free ends are distance S= .64 meters apart. When the free ends are pulled together and joined, find the change in the length of each spring. Their force constants

Fluids: What is the force on the bottom of Archimedes's baththub?

What is the ABSOLUTE pressure on the bottom of Archimede's bathtub if the dimensions of the tub are 3m long by 1.2m wide by 0.8m high? Assume that the tub is filled to the top with water and Archimedes hasn't gotten into the tub yet? What is the force on the bottom of Archimedes's bathtub?


You (m=80.0 kg) are in a rowboat (m=40.0 kg) of volume 0.300 m3. To answer the following, use the density of seawater as 10,050 N/m3. Before you step into the rowboat, how much water does the rowboat displace with nothing in it? What is the maximum load (excluding you and the boat) that you can take on before the rowboat sin

Net Force is determined.

What is the net force acting on the object that has a force of 20.9N 34 degrees West of North and a second force of 34.5N 42 degrees East of North acting on it?