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Chapter 4: Q4CQ (page 159)

What is the relationship between weight and mass? Which is an intrinsic, unchanging property of a body?

Short Answer

Expert verified

Weight is the product of mass and force due to gravity. Mass is an intrinsic, unchanging property of the body.

Step by step solution

01

Relationship between weight and mass

Mass is a measure of the quantity of matter present in something. The amount of matter depends on the number of molecules contained.

Weight is the product of mass and force due to gravity.

Mathematically,

W=mg

HereW is the weight,mis the mass, andlocalid="1654164013297" θis the acceleration due to gravity.

02

Intrinsic and unchanging property of the body

Mass is an intrinsic property of a body, whereas weight is an extrinsic property as it depends on the gravitational field of the body. Mass does not change with location and remains the same everywhere.

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Most popular questions from this chapter

If a constant, nonzero force is applied to an object, what can you say about the velocity and acceleration of the object?

A 1100-kg car pulls a boat on a trailer.

(a) What total force resists the motion of the car, boat, and trailer, if the car exerts a 1900-N force on the road and produces an acceleration of 0.550 m/s2? The mass of the boat plus trailer is 700 kg.

(b) What is the force in the hitch between the car and the trailer if 80% of the resisting forces are experienced by the boat and trailer?

(a) What is the ratio of the strength of the gravitational force to that of the strong nuclear force?

(b) What is the ratio of the strength of the gravitational force to that of the weak nuclear force?

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A basketball player jumps straight up for a ball. To do this, he lowers his body 0.300 m and then accelerates through this distance by forcefully straightening his legs. This player leaves the floor with a vertical velocity sufficient to carry him 0.900 m above the floor.

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(b) Calculate his acceleration while he is straightening his legs. He goes from zero to the velocity found in part (a) in a distance of 0.300 m.

(c) Calculate the force he exerts on the floor to do this, given that his mass is 110 kg.

Why can we neglect forces such as those holding a body together when we apply Newton’s second law of motion?
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