Force

The video tutorial explains the concept of force, illustrating it with examples of a man pushing a car and a woman stopping a piano. It defines force as a push or pull action that changes an object's state of motion or rest. The tutorial discusses force as a vector quantity, emphasizing its magnitude and direction. It uses the example of cycling to explain how multiple forces interact, resulting in a net force. The video also covers the effects of force, such as changing an object's motion, speed, direction, or shape.

What is the common factor in the actions of the man and the woman in the examples given?

• Both are working against gravity.

• Both are using machines to assist them.

• Both are trying to lift heavy objects.

• Both are using force to change the state of motion or rest of an object.

Why is force considered a vector quantity?

• Because it can only be applied in one direction.

• Because it has both magnitude and direction.

• Because it only affects stationary objects.

• Because it is always constant.

What happens when two forces acting on an object are equal in magnitude but opposite in direction?

• The object accelerates.

• The object changes shape.

• The object moves in the direction of the stronger force.

• The object remains stationary or in equilibrium.

What is the resultant force when two forces act in the same direction?

• The sum of all the forces.

• The force with the lesser magnitude.

• The force with the greater magnitude.

• The difference between the two forces.

What is the net force when an object is stationary?

• The net force is equal to the gravitational force.

• The net force is zero.

• The net force is equal to the difference between the forces.

• The net force is equal to the sum of all forces.

How does force affect the state of motion of an object?

• It has no effect on the state of motion.

• It can change the speed, direction, or state of motion of an object.

• It can only start a stationary object.

• It can only stop a moving object.

What is the effect of force on the shape and size of an object?

• Force can only change the size of an object.

• Force has no effect on the shape and size of an object.

• Force can alter both the shape and size of an object.

• Force can only change the shape of an object.