This video tutorial explains Newton's First Law of Motion, also known as the law of inertia. It describes how an object remains at rest or in uniform motion unless acted upon by an unbalanced force. Examples include a ball being kicked and an airplane in flight. The video also covers how to calculate net force by considering the magnitude and direction of forces, and how to determine resultant forces using a parallelogram method. The tutorial concludes with a recap of key concepts and encourages viewers to explore further videos on Newton's laws.

What does Newton's first law of motion state?

• An object will remain at rest or in uniform motion unless acted upon by an unbalanced force.

• An object will change its direction if no force is applied.

• An object will always move in a circular path.

• An object will stop moving if no force is applied.

What happens to a ball when a child stops kicking it?

• It slows down and eventually stops due to friction.

• It speeds up.

• It continues to move indefinitely.

• It changes direction.

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What force causes the ball to stop moving?

• Gravity

• Friction

• Air resistance

• Thrust

What happens to an airplane's motion if the thrust force is equal to the drag force?

• It moves forward at a constant speed.

• It moves backward.

• It accelerates.

• It decelerates.

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What must happen for an airplane to increase its velocity?

• The thrust force must increase.

• The lift force must decrease.

• The weight must increase.

• The drag force must increase.

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How can we find the net force acting on an object?

• By observing the object's color.

• By calculating the object's mass.

• By measuring the object's speed.

• By considering the size and direction of each force acting on the object.

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What happens to the net force if two vertical forces are equal and opposite?

• The net force is unchanged.

• The net force is doubled.

• The net force is halved.

• The net force is zero.

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What is the resultant force when adding together equal north and east forces?

• South-West

• North

• North-East

• East

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What will objects do when they experience no net force?

• They will change direction.

• They will keep doing what they are doing.

• They will decelerate.

• They will accelerate.

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What will an unbalanced force cause an object to do?

• Remain stationary.

• Change its velocity, speed, and/or direction.

• Move in a circular path.

• Disappear.

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