Classical Mechanics Answers

The amplitude of a lightly damped oscillator decreases by 3.0% during each cycle.After how many oscillations(approximately) will the amplitude drop to its half its initial value

Once the box is at the forklift it needs to be lifted to a height of 20m. The forklift uses 4300J of energy to lift the 30kg mass. What is the efficiency of the forklift?

Ms. Ratchford wants to go for a walk. She travels to Starbucks which is 2km [N30E] she then goes to Walmart to get groceries and travels 500m [E10S]. What is her displacement?

Box A, resting on a ramp, is connected box B through a pulley system. The coefficient of kinetic friction for box A, the height of box B above the ground, and the angle of inclination for the ramp are provided in the information section below. After the boxes are released, how far up the ramp will Box A travel?

m A = 7.0 kg

m B = 4.0 kg

µ kA = 0.10

h = 1.5 m

θ = 20°

A truck (6500 kg) is accelerating from 20.0 m/s to 30.0 m/s. calculate the work done?

A box of mass 15 kg is sliding along a smooth floor with a velocity of 15ms^-1. It then enters a rough portion which has a length of 6.0 m. In this portion of the floor, a frictional force of 80.0 N acts on the box. Determine (i) the work done by the frictional force on the box? (ii) the velocity of the box when it leaves the rough surface and (iii) the length of the rough surface required to bring the box completely to rest. Take g =10ms^-2

50 gram of water at 0°C is mixed with an equal mass of water at 80°C. Calculate the resultant increase in entropy

Find the difference in entropy between one gram of ice 0°C and one gram of steam at 100°C. Latent heat of fission of ice is at 80 calories specific heat of water is 1 and latent heat of steam at 100°C with 540 calories

The question talks about a ship called the Lady Washington and and its scale model.

The length of the real ship is 34 meters. The length of the model is 37 inches.

1) The "rigging" of a ship is all of the ropes used to hold sails, floats, and weights. The total rigging on the scale model amounts to an astonishing 327 feet of string. Assuming this number is an accurate scaling of the real rigging, what is the total rigging of the Lady Washington?

2) The real Lady Washington can safely carry 99,000 kilograms of cargo. Assuming that densities of materials are the same and the scaling is really accurate, how much cargo can be carried by the scale model?

For reference, here is a question on the same topic that I answered correctly.

The sails of the real Lady Washington have an area of 410 SI units. What is the area of the sails of the scale model?

Correct Answer: 0.313

A bridge is constructed with only two pillers by one type of material. When a vehicle passes on the bridge it undergoes bending. The increase in which of the following parameters will reduce the bending. 1. Young's Modulus 2. Breadth 3. Depth/Thickness 4. Distance between the pillers