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FAQs on Textbook: Forces - Technical Science for Grade 10

1. What are the different types of forces in physics?
Ans. In physics, the main types of forces include gravitational force, electromagnetic force, strong nuclear force, and weak nuclear force. Gravitational force pulls objects toward each other based on their mass, while electromagnetic force acts between charged particles. The strong nuclear force holds the nuclei of atoms together, and the weak nuclear force is responsible for certain types of radioactive decay.
2. How do balanced and unbalanced forces affect motion?
Ans. Balanced forces occur when two forces acting on an object are equal in size and opposite in direction, resulting in no change in motion. An object at rest stays at rest, and an object in motion continues to move at a constant speed in a straight line. Unbalanced forces, on the other hand, result in a change in motion. They cause an object to accelerate, decelerate, or change direction.
3. What is Newton's First Law of Motion?
Ans. Newton's First Law of Motion, also known as the Law of Inertia, states that an object at rest will remain at rest, and an object in motion will continue moving at a constant velocity in a straight line unless acted upon by a net external force. This law emphasizes the concept of inertia, which is the tendency of an object to resist changes in its state of motion.
4. How do friction and gravity interact to affect an object's movement?
Ans. Friction is a force that opposes the motion of an object when it comes into contact with another surface. Gravity pulls objects toward the Earth, providing weight. When an object is moving, gravity acts to pull it downwards while friction acts to slow it down. The balance between these forces determines how quickly an object can move and whether it will slide or come to a stop.
5. What is the significance of net force in determining an object's motion?
Ans. The net force is the total force acting on an object after all the individual forces are combined. It determines the object's acceleration according to Newton's Second Law of Motion. If the net force is zero, the object will not change its motion. If there is a net force, the object will accelerate in the direction of that force, leading to changes in speed or direction.
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