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Grade 7 Physics: Interaction Between Matter and Energy

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Grade 7 Physics: Interaction Between Matter and Energy

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Questions and Answers

What is the result of an unbalanced net force acting on an object?

The object will accelerate (correct)

The object will remain in motion

The object will change direction

The object will decelerate

What is the relationship between weight and mass?

Weight is proportional to the square of mass

Weight is equal to gravitational force times mass (correct)

Weight is inversely proportional to mass

Weight is independent of mass

What is the purpose of a free body diagram?

To show the relative magnitude and direction of all forces acting on an object (correct)

To calculate the magnitude of forces

To determine the direction of forces

To calculate the acceleration of an object

What is the name of the physicist who developed the three laws of motion and calculus?

Isaac Newton Signup and view all the answers

What is the first law of motion also known as?

Law of Inertia Signup and view all the answers

What is the formula for velocity?

displacement over time Signup and view all the answers

Which of the following is NOT a fundamental force of nature?

Unified Field Theory Signup and view all the answers

What is the net force if the sum of all forces acting on an object is zero?

Balanced force Signup and view all the answers

Which type of force is responsible for the attraction between charged particles?

Electrostatic Force Signup and view all the answers

What is a scalar quantity?

A quantity described with a single number Signup and view all the answers

Which of the following is an example of a non-contact force?

Electromagnetic Force Signup and view all the answers

What is the weakest of the four fundamental forces?

Gravity Signup and view all the answers

What is the type of motion that does not require an external cause to occur?

Natural motion Signup and view all the answers

What is the formula for displacement?

final position - initial position Signup and view all the answers

What is the type of force that opposes the motion of an object?

Frictional Force Signup and view all the answers