G-11 Physics worksheet on Dynamics

What is Newton's First Law of Motion?

• An object in motion will eventually stop without any external force.

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

• An object will accelerate if no forces are acting on it.

• An object will change direction only if a force is applied.

Which of the following is an example of inertia?

• A car accelerating quickly from a stop.

• A ball rolling down a hill.

• A person sitting still in a chair.

• A passenger lurching forward when a car stops suddenly.

What does Newton's Second Law state?

• An object in motion will stay in motion unless acted upon by an equal force.

• The acceleration of an object is inversely proportional to its mass.

• The force acting on an object is equal to the mass of the object multiplied by its acceleration (F = ma).

• The total energy of an isolated system remains constant over time.

If a net force of 10 N is applied to a 2 kg object, what is its acceleration?

• 5 m/s²

• 2 m/s²

• 10 m/s²

• 20 m/s²

What is the unit of force in the SI system?

• Newton

• Joule

• Watt

• Pascal

Which of the following best describes friction?

• Friction is the force that accelerates an object in motion.

• Friction is the attraction between two different materials.

• Friction is the energy lost due to heat in a moving object.

• Friction is the resistance to motion between two surfaces in contact.

What type of friction acts on a stationary object?

• Rolling friction

• Static friction

• Fluid friction

• Kinetic friction

What is the coefficient of friction?

• The coefficient of friction is always greater than 1.

• The coefficient of friction is a type of force.

• The coefficient of friction is a measure of mass.

• The coefficient of friction is a dimensionless value, typically denoted as μ.

What happens to the frictional force when the surface area increases?

• The frictional force increases with surface area.

• The frictional force does not change when the surface area increases.

• The frictional force is directly proportional to surface area.

• The frictional force becomes zero with increased surface area.

What is momentum defined as?

• Momentum is the product of acceleration and distance.

• Momentum is defined as force divided by time.

• Momentum is the rate of change of energy.

• Momentum is defined as mass times velocity.