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Grade 9 Science force and laws of motion

What is the formula for calculating force?

F = ma

F = mv

F = md

F = ms

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

Friction

Gravity

Magnetic force

Electric force

What is the SI unit of force?

Newton

Kilogram

Meter

Second

Which of Newton's laws states that an object at rest will stay at rest, and an object in motion will stay in motion with the same speed and direction unless acted upon by an external force?

Newton's First Law

Newton's Second Law

Newton's Third Law

None of the above

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

Gravity

Friction

Magnetic force

Tension

What is the relationship between force, mass, and acceleration according to Newton's Second Law?

Which of the following is an example of a balanced force?

A book resting on a table

A car accelerating

A person pushing a wall

A ball rolling down a hill

What is the unit of measurement for acceleration?

Meters per second squared

Kilograms

Newtons

Joules

According to Newton's Third Law, for every action, there is an equal and opposite _________.

Which of the following is an example of a force pair?

Pushing a door

Walking on the ground

Throwing a ball

Bouncing on a trampoline

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