Mechanics | Relativity Answers

A piece of metal displaces 3.56×10-5 m3 of water. Find the buoyant force.

In a hydraulic press, the area of the small piston is 25.0 cm2 and the area of the large piston is 325 cm2. If a force of 75.0 N is exerted on the small piston, find the weight of the object that can be lifted by the large piston.

The tires of a 15700 N automobile are inflated to a pressure of 172000 Pa (25 psi). Assuming that each tire supports 1⁄4 of the weight of the car, calculate the area of contact between a tire and the road.

A pirate in a movie is carrying a chest (0.30 m × 0.30 m × 0.20 m) that is supposed to be filled with gold. To see how ridiculous this is, determine the mass of the gold. The mass density of gold is 19300 kg/m3. To judge how large this is by converting to lbs., using the fact that 1 kg has a weight of 2.2 lbs.

at what speed the mass of proton be doubled

Calculate the buoyant force on a cube of metal with an edge of 1.0 cm that is placed in salt water. The density of the metal is 7000 kg/m3, and the density of the salt water is 1000 kg/m3

1. A car with tires of diameter 787 mm travels on the highway at 76 mph (1 mph = 0.44704 m/s). How long does it take a pebble stuck on the tread of the tire on its radial edge to revolve around the tire?

Report the value in milliseconds rounded to the nearest whole number.

A hydraulic press has two pistons, where the diameter of one of them is double that of the other, when the small piston is affected by pressure P, the pressure affects the big piston will be

Solve dy/dt + ycotx = e^cosx for x= pi by two and y= -2

A delivery truck hits a parked car from behind. The mass of the car is 2550 kg. What force is exerted on the car if (a) the car is rigid and accelerates to 4.5 m/s in 0.20 s? (b) the car has crumple zones and accelerates to 4.5 m/s in 0.30 s?