An 80 kg man is standing in an elevator which is moving down and slowing down at a rate of 2.0 m/s2. how hard must the floor of the elevator push up on the man?

We are given the description of an enclosure that has fencing on 3 sides and can use 3,056 yards of fencing. We are to find the dimensions that will maximize the area contained within the fence. A rectangle formed along a straight portion of a river.

what type of current measurements should never be taken on circuits that may contain high currents or unknown currents?

What's the runners acceleration with a mass of 80 kg?

Why does an astronaut weigh less on the moon than on Earth? a. The astronaut has less mass on the moon. b. The astronaut is farther from Earth's center when he or she is on the moon. c.

pitot tube on an airplane flying at a standard sea level reads 1.07 x 105 N/m2. What is the velocity of the airplane?

A herringbone or tire track pattern on a radiograph is a result of

A 7150-kg railroad car travels alone on a level frictionless track with a constant speed of 24.5 m/s. A 3100-kg load, initially at rest, is dropped onto the car What will be the car's new speed?

How is friction related to conservation if mechanical energy?

Does the ear drum vibrates when struck by sound waves and directly sends a message to the brain that is then recognized as sound?

Think of an example that you could use to convice a friend that an object at rest has an "internal hold back property" that is different from a frictional force or the force of the earth's gravity.