Class 9th Science: Force and Laws of Motion Quiz

Force and Acceleration

• Force causes an object to accelerate.
• The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.
• This relationship is described by Newton's Second Law of Motion: F = ma, where F is the net force, m is the mass, and a is the acceleration.

Units of Force

• The unit of force in the International System of Units (SI) is the Newton (N).
• One Newton is defined as the force required to accelerate a 1 kg mass at 1 m/s².

Force, Mass, and Acceleration

• If a force of 10 N is applied to an object with a mass of 5 kg, the resulting acceleration is 2 m/s².
• This can be calculated using Newton's Second Law: a = F/m = 10 N / 5 kg = 2 m/s².

Zero Net Force

• If the net force acting on an object is zero, the object will either remain at rest or continue moving at a constant velocity.
• This is known as Newton's First Law of Motion or the Law of Inertia.

Test your knowledge of force and laws of motion with this quiz. Explore the relationship between force and acceleration, the unit of force in the International System of Units (SI), and calculations involving force and acceleration.