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What happens to a book lying still on a table?

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Which of these is an example of an ‘unbalanced’ force?

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If two children push a box with the same strength from opposite sides, what will happen to the box?

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What is a ‘force’?

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When are forces considered ‘balanced’?

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What is needed to make an object that is currently still, start moving?

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If a ball is thrown into the air, what causes it to eventually fall back down?

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When you are riding a bicycle at a constant speed on a flat road, which statement about forces is most accurate (ignoring small changes)?

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What happens when an ‘unbalanced’ force acts on a moving object?

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A student pushes a toy car across the floor. What force tries to slow the car down?

State whether the following statement is True or False.

A ‘balanced’ force always causes an object to speed up.

State whether the following statement is True or False.

Unbalanced’ forces can make a still object start to move.

State whether the following statement is True or False.

When you push a wall, the wall pushes back on you with an equal amount of force.

State whether the following statement is True or False.

Gravity is an example of a force.

State whether the following statement is True or False.

If an object is sitting perfectly still, there are no forces acting on it.

State whether the following statement is True or False.

Friction is a force that helps objects move easily.

State whether the following statement is True or False.

A ‘balanced’ force can make a moving object stop.

State whether the following statement is True or False.

When you push a swing to make it move higher, you are applying an ‘unbalanced’ force.

State whether the following statement is True or False.

Forces can only make objects move faster.

State whether the following statement is True or False.

If two children pull a toy in the same direction, their forces add up.

Read the statement and its reason. Choose the correct option.

Statement: A ball rolling on a flat surface will eventually slow down and stop. Reason: Friction is an ‘unbalanced’ force that opposes the ball’s motion.

Read the statement and its reason. Choose the correct option.

Statement: In a tug-of-war, if both teams pull with exactly the same strength, the rope will not move. Reason: The forces applied by each team are ‘balanced’.

Read the statement and its reason. Choose the correct option.

Statement: To make an object that is not moving start to move, an ‘unbalanced’ force is required. Reason: ‘Balanced’ forces keep objects still or moving at a ‘constant speed’.

Read the statement and its reason. Choose the correct option.

Statement: A rocket launching into space is an example of ‘balanced’ forces. Reason: Its engines are pushing it upwards with great force.

Read the statement and its reason. Choose the correct option.

Statement: If you push a toy car on a carpet, it will keep moving forever at the same speed. Reason: There are no forces like friction acting on it.

Read the statement and its reason. Choose the correct option.

Statement: Two children pushing a heavy box in the same direction will make the box move faster. Reason: Their forces add up, creating a larger ‘unbalanced’ force.

Read the statement and its reason. Choose the correct option.

Statement: If you stop pushing a swing, it will eventually stop moving. Reason: Air resistance and gravity are still acting on it, creating an ‘unbalanced’ force.

Read the statement and its reason. Choose the correct option.

Statement: A feather falls slower than a rock. Reason: Air resistance has a greater ‘unbalanced’ effect on the feather due to its larger surface area compared to its weight.

Read the statement and its reason. Choose the correct option.

Statement: Gravity is an ‘unbalanced’ force that pulls objects towards the Earth. Reason: It causes objects to fall and is usually not perfectly ‘balanced’ by other upward forces (unless an object is resting on something).

Read the statement and its reason. Choose the correct option.

Statement: ‘Balanced’ forces can change an object’s direction. Reason: ‘Balanced’ forces create equal pushes and pulls in opposite directions.

Select an item from Column A, then select its match in Column B.

Fill in the blank with the correct word.

A — Select —pullpushgravitybalancednot moveunbalancedFrictionUnbalanced or a — Select —not moveunbalancedgravitypullFrictionbalancedpushUnbalanced is called a force.

Fill in the blank with the correct word.

When forces on an object are equal and opposite, they are called — Select —Frictionnot movepushbalancedUnbalancedgravitypullunbalanced forces.

Fill in the blank with the correct word.

— Select —Unbalancedpullnot movegravityunbalancedbalancedpushFriction forces cause an object to start moving, stop moving, or change direction.

Fill in the blank with the correct word.

If a toy car is not moving, the forces acting on it are — Select —unbalancedpushnot moveUnbalancedpullFrictionbalancedgravity.

Fill in the blank with the correct word.

The force that pulls everything down towards the Earth is — Select —pullUnbalancedgravitynot movebalancedunbalancedpushFriction.

Fill in the blank with the correct word.

When you kick a ball, you apply an — Select —not movepushunbalancedUnbalancedgravitypullbalancedFriction force to it.

Fill in the blank with the correct word.

— Select —unbalancedbalancedFrictionUnbalancednot movepullgravitypush is a force that makes it hard to slide things across the floor.

Fill in the blank with the correct word.

If two people pull a rope with the same strength in opposite directions, the rope will — Select —not moveFrictionUnbalancedgravitybalancedpushunbalancedpull.

Fill in the blank with the correct word.

To make a heavy box slide, you need to apply an — Select —gravityunbalancedbalancedpullUnbalancedFrictionnot movepush force.

Fill in the blank with the correct word.

When an object speeds up, slows down, or changes direction, an — Select —unbalancedpullgravitynot movepushUnbalancedFrictionbalanced force is at work.

Solve the following problem about forces.

John pushes a toy car with 5 units of force. His friend Mary pushes the same car in the same direction with 3 units of force. What is the total force pushing the car?

Solve the following problem about forces.

In a tug-of-war, Team A pulls with 10 units of strength, and Team B pulls with 7 units in the opposite direction. What is the ‘net’ force and in which direction?

Solve the following problem about forces.

A book is on a table. Gravity pulls it down with 8 units of strength. How much force does the table push up with to keep the book perfectly still?

Solve the following problem about forces.

Two friends push a toy from opposite sides. Friend 1 pushes with 6 units of force. How much force must Friend 2 push with for the toy to stay perfectly still?

Solve the following problem about forces.

A cart is pulled with 3 units of force to the left. Another child pulls it with 5 units of force to the right. Which way will the cart move?

Solve the following problem about forces.

If you push a door with 10 units of force and it opens, was the force you applied ‘balanced’ or ‘unbalanced’ compared to the door’s resistance?

Solve the following problem about forces.

A box needs 7 units of force to start moving. You push it with 5 units of force. Will the box move?

Solve the following problem about forces.

If you push a toy car with 8 units of force, and the friction from the floor pulls back with 3 units of force, what is the ‘net’ force moving the object forward?

Solve the following problem about forces.

A car’s engine provides 15 units of push. Air resistance and road friction add up to 10 units of force pushing backward. What is the ‘net’ force making the car move forward?

Solve the following problem about forces.

If a seesaw is perfectly ‘balanced’ with a child on one side weighing 20 units, how much weight is on the other side?

Solve the following problem about forces.

Two people pull a rope. One pulls with 9 units of force, the other with 9 units of force in the same direction. What is the total pulling force?

Solve the following problem about forces.

A boat is pushed by the wind with 7 units of force to the east and pushed by the water current in the opposite direction with 4 units of force. What is the ‘net’ force and its direction?

Solve the following problem about forces.

If an object has a force of 10 units pushing it right, and 10 units pushing it left, what is the ‘net’ force acting on the object?

Solve the following problem about forces.

To move a toy car, you need to apply 3 units of force. You have already applied 1 unit of force. How many more units of force do you need to add to start it moving?

Solve the following problem about forces.

A child pushes a toy box with 5 units of force. Another child pushes in the opposite direction with 2 units of force. What is the total ‘difference’ in force?

Solve the following problem about forces.

If gravity pulls an apple down with 4 units of force, and the tree branch holds it up with 4 units of force, what is the ‘net’ force on the apple while it’s hanging still?

Solve the following problem about forces.

A bicycle moves forward with 8 units of push from the pedals. Air resistance pushes back with 3 units of force. What is the overall forward force that makes the bicycle speed up?

Solve the following problem about forces.

A shopping cart is pushed by a customer with 7 units of force. Another customer accidentally pushes it in the opposite direction with 2 units of force. What is the strength of the ‘unbalanced’ force moving the cart?

Solve the following problem about forces.

If a car is moving at a steady, ‘constant’ speed, and its engine pushes with 20 units of force, how much force from friction and air resistance is pushing backward?

Solve the following problem about forces.

A child pulls a wagon with 6 units of force. If the force of friction pulling back on the wagon is 2 units, what is the ‘net’ force pulling the wagon forward?

Solve the following problem about forces.

A team pulls one side of a rope with 15 units of force. The other team pulls with 12 units of force. What is the difference in their pulling strengths?

Solve the following problem about forces.

A toy block is pushed by two hands. One hand pushes with 4 units of force, and the other hand pushes in the same direction with 5 units of force. What is the total ‘unbalanced’ force moving the block?

Solve the following problem about forces.

If a boat has 11 units of forward thrust from its motor and 6 units of water resistance pushing backward, what is the ‘net’ forward force acting on the boat?

Solve the following problem about forces.

A small ball falls towards the ground due to gravity with 7 units of force. The air pushes up on it with 1 unit of force. What is the ‘net’ downward force causing the ball to fall?

Solve the following problem about forces.

If an object is not moving, and gravity pulls it down with 12 units of force, how much upward force must be supporting it to keep it still?

Solve the following problem about forces.

A child is pushing a toy box with 9 units of force. The box experiences 4 units of friction. What is the ‘net’ force making the box accelerate?

Solve the following problem about forces.

If a rocket engine produces 30 units of thrust upwards, and gravity pulls it down with 10 units of force, what is the ‘net’ upward force on the rocket?

Solve the following problem about forces.

A toy car is pushed with 6 units of force. If the car experiences 6 units of friction, what is the ‘net’ force on the car?