Gr 11 Physical Sciences: Ch 2.3 Forces between masses

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What is the relationship between weight and mass?

F_g = m^2g

F_g = mg (correct)

F_g = g/m

F_g = m

What happens to an object when it experiences weightlessness?

It is accelerated upward

There is no normal force acting on it (correct)

It is at rest

It is outside the gravitational field

Why do astronauts in space experience weightlessness?

Because they are accelerating upward at a constant rate

Because they are outside the gravitational field of the Earth

Because they are at rest with respect to the Earth

Because they are in continuous free fall around the Earth (correct)

What type of problems involve calculating a quantity in terms of another known quantity?

Comparative problems Signup and view all the answers

What is the first step in solving comparative problems?

Write out equations and calculate all quantities for the given situation Signup and view all the answers

What is the ultimate goal of understanding and applying the principles of gravity?

To analyze and predict the gravitational interactions between objects Signup and view all the answers

What is the nature of the gravitational force?

Attractive and non-contact Signup and view all the answers

Who defined the gravitational force and showed it explains both falling bodies and astronomical motions?

Sir Isaac Newton Signup and view all the answers

What is the unit of gravitational force in the formula F = G(m1m2)/d^2?

Newtons (N) Signup and view all the answers

What is the value of the gravitational constant (G)?

6.67 × 10^−11 N·m²·kg⁻² Signup and view all the answers

What is the formula for gravitational force?

F = G(m1m2)/d^2 Signup and view all the answers

What is the approximate value of the gravitational acceleration (g) near the surface of the Earth?

9.8 m·s⁻² Signup and view all the answers

What is the unit of weight?

Newtons (N) Signup and view all the answers

What remains constant regardless of location?

Mass Signup and view all the answers

What is the primary reason for an object to experience weightlessness?

There is no normal force acting on the object. Signup and view all the answers

What is the main purpose of solving comparative problems?

To express a quantity in terms of another known quantity. Signup and view all the answers

In what type of motion do astronauts in space experience weightlessness?

Continuous free fall Signup and view all the answers

What is the final step in solving comparative problems?

Write the second case in terms of the first case. Signup and view all the answers

What is the condition necessary for an object to experience weightlessness in orbit?

The object and its surroundings must experience the same gravitational acceleration. Signup and view all the answers

What is the underlying principle behind the calculation of weight?

The gravitational acceleration acting on the object. Signup and view all the answers

What is the direction of the gravitational force between two objects?

Along the line connecting the two objects Signup and view all the answers

What is the effect of doubling the distance between two objects on the gravitational force between them?

The gravitational force becomes four times weaker Signup and view all the answers

What is the relationship between the gravitational force and the mass of an object?

The gravitational force is directly proportional to the mass of an object Signup and view all the answers

What is the significance of the gravitational constant (G)?

It is a proportionality constant in the gravitational force formula Signup and view all the answers

What is the difference between mass and weight?

Mass is a scalar quantity, while weight is a vector quantity Signup and view all the answers

What is the unit of measurement for the gravitational acceleration (g) near the surface of the Earth?

Meters per second squared Signup and view all the answers

What is the significance of the equation F = mg?

It relates the gravitational force to the mass of an object Signup and view all the answers

What is the effect of the gravitational force on the motion of an object?

It causes the object to accelerate towards the center of the Earth Signup and view all the answers

What is the direction of the force between two point masses due to gravity?

Along the line connecting the two masses Signup and view all the answers

What happens to the gravitational force between two point masses if the distance between them is tripled?

It becomes one ninth of its original value Signup and view all the answers

What is the relationship between the mass of an object and its weight on the surface of the Earth?

Weight is directly proportional to the mass Signup and view all the answers

What is the significance of the gravitational constant (G) in the formula for gravitational force?

It is a fundamental constant of nature Signup and view all the answers

What is the difference between the gravitational force and gravitational acceleration?

Gravitational force is the force of gravity on an object, while gravitational acceleration is the force per unit mass Signup and view all the answers

What is the significance of the equation F = mg?

It relates the weight of an object to its mass Signup and view all the answers

What is the difference between a large object and a point mass in terms of gravity?

A large object is treated as a point mass for gravitational force calculations Signup and view all the answers

Why do all objects near the surface of the Earth experience the same gravitational acceleration?

Because the gravitational acceleration is independent of the mass of the object Signup and view all the answers

What is the primary reason for an object to have weight?

The gravitational force acting on the object Signup and view all the answers

Which of the following situations does not involve weightlessness?

An object on a slope Signup and view all the answers

What is the purpose of writing out equations and calculating all quantities for the given situation in comparative problems?

To identify the unknown quantity Signup and view all the answers

What is the result of substituting all first case variables into the second case in comparative problems?

The second case is written in terms of the first case Signup and view all the answers

What is the underlying principle behind the calculation of weight in terms of mass?

The law of universal gravitation Signup and view all the answers

What is the ultimate goal of analyzing and predicting the gravitational interactions between objects?

To develop a comprehensive theory of gravity Signup and view all the answers

Gr 11 Physical Sciences: Ch 2.3 Forces between masses

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Questions and Answers

What is the relationship between weight and mass?

What happens to an object when it experiences weightlessness?

Why do astronauts in space experience weightlessness?

What type of problems involve calculating a quantity in terms of another known quantity?

What is the first step in solving comparative problems?

What is the ultimate goal of understanding and applying the principles of gravity?

What is the nature of the gravitational force?

Who defined the gravitational force and showed it explains both falling bodies and astronomical motions?

What is the unit of gravitational force in the formula F = G(m1m2)/d^2?

What is the value of the gravitational constant (G)?

What is the formula for gravitational force?

What is the approximate value of the gravitational acceleration (g) near the surface of the Earth?

What is the unit of weight?

What remains constant regardless of location?

What is the primary reason for an object to experience weightlessness?

What is the main purpose of solving comparative problems?

In what type of motion do astronauts in space experience weightlessness?

What is the final step in solving comparative problems?

What is the condition necessary for an object to experience weightlessness in orbit?

What is the underlying principle behind the calculation of weight?

What is the direction of the gravitational force between two objects?

What is the effect of doubling the distance between two objects on the gravitational force between them?

What is the relationship between the gravitational force and the mass of an object?

What is the significance of the gravitational constant (G)?

What is the difference between mass and weight?

What is the unit of measurement for the gravitational acceleration (g) near the surface of the Earth?

What is the significance of the equation F = mg?

What is the effect of the gravitational force on the motion of an object?

What is the direction of the force between two point masses due to gravity?

What happens to the gravitational force between two point masses if the distance between them is tripled?

What is the relationship between the mass of an object and its weight on the surface of the Earth?

What is the significance of the gravitational constant (G) in the formula for gravitational force?

What is the difference between the gravitational force and gravitational acceleration?

What is the significance of the equation F = mg?

What is the difference between a large object and a point mass in terms of gravity?

Why do all objects near the surface of the Earth experience the same gravitational acceleration?

What is the primary reason for an object to have weight?

Which of the following situations does not involve weightlessness?

What is the purpose of writing out equations and calculating all quantities for the given situation in comparative problems?

What is the result of substituting all first case variables into the second case in comparative problems?

What is the underlying principle behind the calculation of weight in terms of mass?

What is the ultimate goal of analyzing and predicting the gravitational interactions between objects?

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