Recent content by Mayumi

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An airplane has an effective wing surface area of 11.4 m^2 that is generating the lift force. In level flight the air speed over the top of the wings is 53.0 m/s, while the air speed beneath the wings is 38.0 m/s. What is the weight of the plane?

A lost shipping container is found resting on the ocean floor and completely submerged. The container is 6.0 m long, 2.8 m wide, and 3.0 m high. Salvage experts attach a spherical balloon to the top of the container and inflate it with air pumped down from the surface. When the balloon's radius...

The vertical surface of a reservoir dam that is in contact with the water is 130 m wide and 14 m high. The air pressure is one atmosphere. Find the magnitude of the total force acting on this surface in a completely filled reservoir.

A worker stands still on a roof sloped at an angle of 23° above the horizontal. He is prevented from slipping by a static frictional force of 430 N. Find the mass of the worker.