1. Explain what Centrifugal force is.
2. What do you mean by the weight of the body on moon.
3. Give the value of G with proper units.
4. Give the value of g with proper units.
5. What is measured by physical balance?
Two Marks questions
1. At what height above the earth’s surface would the value of acceleration due to gravity
be half of what it is on the surface? Take radius of earth to be R.
2. A body of 90kgf on the surface of earth. How much will it weigh on the surface of
moon whose mass is 1/9 and radius is ½ of that of earth?
3. A piece of paper takes much longer to fall than a stone through the same distance.
Explain the reason.
4. Consider a heavenly body which has a mass twice that of the earth and radius thrice
that of the earth .What will be the weight of the book on this heavenly body, if its
weight on earth is 900 N?
Three Marks questions
1. Why gravitational force is usually unnoticeable?
2. Prove that acceleration due to gravity is independent of mass of the body.
3. How can the average density of the earth can be determined?
4. What is buoyancy and buoyant force? Upon what factors do they depend
Five Marks questions
1. Find the percentage change in the weight of a body when it is taken from equator to
poles. The polar radius is 6,357 Km and equatorial radius is 6,378 Km.
2. The density of ice is 918kgm-3
and that of sea water is 1,030kgm-3
.An iceberg floats
with a portion 224 liters outside water. Find the volume of iceberg.
3. What are the laws of flotation? Give some illustrations.
Answers
Answered by
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Answer:
Centrifugal force is the apparent outward force on a mass when it is rotated. Think of a ball on the end of a string that is being twirled around, or the outward motion you feel when turning a curve in a car. In an inertial frame, there is no outward acceleration since the system is not rotating.
Answered by
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Answer:
Centrifugal force is the apparent outward force on a mass when it is rotated. Think of a ball on the end of a string that is being twirled around, or the outward motion you feel when turning a curve in a car. In an inertial frame, there is no outward acceleration since the system is not rotating.
Explanation:
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