The acceleration of a body falling under conditions where air resistance is negl

Question

The acceleration of a body falling under conditions where air resistance is negligible is approximately equal to 32 feet per second per second, or 9 g meters per second per second true False Errors in measurements lead to errors in results. As one cannot measure with infinite precision, one cannot state numerical results with complete certainly Which of the following is not a vector quantity. Force Acceleration Displacement Speed Velocity An object traveling at a constant speed must have a constant velocity. True False The metric systems is based upon powers of 2 5 10 100

Explanation / Answer

A) true. The acceleration of body under the conditions where air resistance is negligible is about 9.8 m/s2

B) true.

C) speed is not a vector quantity. As speed = distance/ time . ( Since it doesn't have direction .

D) false.lets take an example of circular motion . The speed of object remains constant while velocity keep changing ( direction)

E) the metric system is decimal based system of measurements. Decimals means all the units are based on the power of 10.

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