WorksheetsForces 7th
Total questions: 15
Worksheet time: 11mins
Matthew and Darren are pushing their kayak across the grass toward a lake. Matthew is pushing the kayak forward with a force of 400N. Darren is pushing the kayak forward with a force of 300N. The grass is pushing the kayak backward with a force of 600N.
Assume all other forces on the kayak are balanced. Which statement describes the forces on the kayak?
The forces are balanced, there is no net force on the kayak.
The forces are unbalanced, there is a net force on the kayak.
All these cars are traveling with the same acceleration. Which one will have the greatest force?
Blue
Gold
Orange
Silver
Yellow
All of these cars have the same force. Which one has the slowest acceleration?
Blue
Gold
Orange
Silver
Yellow
Isaac Newton was born in the 1600s and studied how objects move. He discovered three fundamental laws about forces and motion. According to Newton's third law, for every force, there is an equal and opposite force.
Consider the following force:
The Sun is pulling on Earth.
According to Newton's third law, what other force must be happening?
The Earth is pulling on the Sun
The Earth is pushing on the Sun
There are no other forces
The Sun is pushing on the Earth
Consider the following force:
Due to gravity, Earth is pulling down on a satellite with a force of 2,000N.
According to Newton's third law, what other force must be happening?
The satellite is pulling up on the Earth with 2000N of force.
The Earth is pushing down on the satellite with 2000N of force
The Earth is pulling up on the satellite with 2000N of force
Consider the following force:
A disc magnet is pulling up on a paper clip with a force of 30N.
According to Newton's third law, what other force must be happening?
The disc magnet is pushing down on the paper clip with a force of 30N
The paper clip is pulling down on the disc magnet with a force of 30N
The disc magnet is pulling down on the paper clip with a force of 30N
Suzie is picking up her potted cactus as she cleans her room. She is pulling the cactus up with a force of 20N. Earth's gravity is pulling the cactus down with a force of 15N.
Assume all other forces on the cactus are balanced. Which statement describes the forces on the cactus?
The forces are balanced, there are no net forces on the cactus
The forces are unbalanced, there is a net force on the cactus
Wendy is hammering a chisel into a block of marble to carve a sculpture. The hammer is pushing the chisel forward with a force of 40N. The block of marble is pushing the chisel backward with a force of 40N.
Assume all other forces on the chisel are balanced. Which statement describes the forces on the chisel?
The forces are balanced, so there is no net force on the chisel.
The forces are unbalanced, so there is a net force on the chisel.
Three dogs, Dusty, Lucky, and Skip, are playing with a teddy bear. Dusty and Lucky are pulling the teddy bear to the left. Dusty is pulling with a force of 150N, and Lucky is pulling with a force of 160N. Skip is pulling the teddy bear to the right with a force of 200N.
Assume all other forces on the teddy bear are balanced. Which statement describes the forces on the teddy bear?
The forces are balanced, the bear is not moving.
The forces are unbalanced, the bear is moving to the left.
The forces are balanced, the bear is moving.
The forces are unbalanced, the bear is moving to the right.
The images show two pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material.
Think about the magnetic force between the magnets in each pair. Which of the following statements is true?
The magnitude of the magnetic force in pair 1 is greater.
The magnitude of the magnetic force in pair 2 is greater
The magnitude of the magnetic force is equal in both pairs
The images below show four pairs of magnets. The magnets in different pairs do not affect each other. All the magnets shown are made of the same material, but some of them are different sizes and shapes.
Think about the magnetic force between the magnets in each pair. Select the pair with the magnetic force of the smallest magnitude.
Pair 1
Pair 2
Pair 3
Pair 4
When there is more force in one direction than in the opposite direction. This causes a change in movement.
Unbalanced force
Balanced force
Newton’s 1st law
Newton’s 2nd law
A hockey puck is hit by a player & moves forward… how do you know the forces were balanced or unbalanced?
Anytime a force is there it is unbalanced
The puck is at rest, so balanced
Anytime a force is there it is balanced
The puck is moving, so unbalanced
When an object does not move and is stable.
Force
Friction
Mass
at Rest
If there were a giant bar magnet inside the earth, what end of the magnet would need to be closest to Canada to make the compass needle always point toward Earth’s north pole?
North
South
