Physics Laws Entrance Exam

What is Newton's first law of motion?

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

• An object will change direction if no force is acting on it

• An object will accelerate if no force is acting on it

• An object will stop moving if no force is acting on it

State the formula for calculating force.

• Force = Mass x Acceleration

• Force = Mass / Acceleration

• Force = Mass - Acceleration

• Force = Mass + Acceleration

Explain the concept of inertia.

• Inertia is the measure of an object's weight.

• Inertia is the resistance of an object to changes in its state of motion.

• Inertia is the ability of an object to move freely without any external force.

• Inertia is the tendency of an object to speed up when a force is applied.

What is the law of conservation of energy?

• Energy can be transformed into matter

• Energy cannot be created or destroyed, only transferred or transformed.

• Energy can be destroyed completely

• Energy can be created out of nothing

Define Newton's second law of motion.

• The acceleration of an object is directly proportional to the net force acting on it.

• The force acting on an object is equal to the mass of that object multiplied by its acceleration.

• Newton's second law states that force is equal to the velocity of an object.

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

How does Newton's third law of motion apply in everyday life?

• Newton's third law applies in everyday activities like walking, swimming, or sitting, where every action has an equal and opposite reaction.

• Newton's third law does not have any practical applications

• Newton's third law states that action and reaction are not equal

• Newton's third law only applies in outer space

What is the formula for calculating acceleration?

• acceleration = (final velocity + initial velocity) / time

• acceleration = (final velocity * initial velocity) / time

• acceleration = (final velocity - initial velocity) / time

• acceleration = (final velocity - initial velocity) * time

Describe the principle of conservation of momentum.

• Total momentum before an event is equal to the total momentum after the event.

• Momentum conservation only applies to linear motion

• Momentum is always lost during collisions

• Momentum is only conserved in isolated systems

What is the relationship between force and motion?

• Motion causes force

• Force and motion are unrelated

• Force is the cause of motion, according to Newton's second law of motion.

• Force is the result of motion

Explain the difference between mass and weight.

• Mass is the same as weight

• Weight is a measure of the amount of matter in an object

• Mass is the force of gravity acting on an object

• Mass is a measure of the amount of matter in an object, while weight is the force of gravity acting on that mass.