WorksheetsLesson 3: Force Pairs
Total questions: 11
Worksheet time: 6mins
Opposing force
• Provide an example:
Friction acting against a moving object
Gravity pulling objects downward
A car accelerating forward
A person lifting a box
Newton’s 3rd Law states that:
For every action, there is an equal and opposite reaction.
An object in motion stays in motion unless acted upon by an external force.
Force equals mass times acceleration.
Energy cannot be created or destroyed.
Newton’s 3rd Law • Provide an example:
A swimmer pushes against the wall and moves in the opposite direction.
A ball falls straight down due to gravity.
A car accelerates when the gas pedal is pressed.
A plant grows towards sunlight.
Force pair • Define it:
A pair of equal and opposite forces acting on two different bodies.
A pair of forces acting in the same direction on the same body.
A pair of forces acting at different times on the same body.
A pair of forces that cancel each other out on a single object.
Force pair
• Provide an example:
Action and reaction forces between a bat and a ball
Frictional force on a moving car
Gravitational force between Earth and Moon
Magnetic force between two magnets
Normal force
• Define it:
The force exerted by a surface perpendicular to an object resting on it.
The force that pulls objects toward the center of the Earth.
The force that opposes the motion between two surfaces in contact.
The force that acts parallel to the surface of contact.
Normal force
• Provide an example:
A book resting on a table
A car accelerating on a highway
A ball falling freely through the air
A leaf floating on water
Collision force is defined as:
The force exerted when two objects collide.
The speed at which objects move.
The energy stored in an object.
The distance between two objects.
Collision force • Provide an example:
A car hitting a wall
A leaf falling gently to the ground
A person walking slowly
A balloon floating in the air
Elastic collision is defined as:
A collision in which both momentum and kinetic energy are conserved.
A collision in which only momentum is conserved.
A collision in which only kinetic energy is conserved.
A collision in which neither momentum nor kinetic energy is conserved.
Elastic collision
• Provide an example:
Two billiard balls colliding and bouncing apart
A ball of clay sticking to another ball
A car crash where both cars are deformed
A ball dropped on sand and not bouncing
