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Concept of centripetal force on a curved road.

On a highway curve with radium 50m, the maximum centripedal force that can act on a 1,000kg car going around the curve is 8,000 Newtons. What speed limit should be posted for the curve so that cars can negotiate it safely?

Subject:

Physics

Topic:

Classical Mechanics

Posting ID:

8192

OTA ID:

103642

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Density of material

The standard kilogram is a platinum-iridium cylinder 39.0mm in height and 39.0mm in diameter. What is the density of the material?

Subject:

Physics

Topic:

Classical Mechanics

Posting ID:

8212

OTA ID:

103300

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Acceleration

A 50.0-g superball traveling at 25.0 m/s bounces off a brick wall and rebounds at 22.0 m/s. A high-speed camera records the event. If the ball is in contact with the wall for 3.50 ms, what is the magnitude of the average acceleration of the ball during this time interval? (note: 1 ms= 10^-3 s.)

Subject:

Physics

Topic:

Classical Mechanics

Posting ID:

8215

OTA ID:

103824

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Components of a vector

A golfer on the green takes three strokes to sink the ball. The successive diplacements are 4.00m to the north, 2.00m north east and 1.00m at 30 degrees west of south. Starting at the same initial point, an expert golfer could make the hole in what single-displacement?

Subject:

Physics

Topic:

Classical Mechanics

Posting ID:

8218

OTA ID:

102959

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Components of a vector and unit vectors

While exploring a cave a woman starts at the entrance and moves the following distances. She goes 75.0m north,250m east, 125m @an angle of 30 degrees north of east and 150m south. Find the resultant displacement from the cave entrance.

Subject:

Physics

Topic:

Classical Mechanics

Posting ID:

8219

OTA ID:

103642

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