Explanation:

Intro:

Force is an integral part of physics, and understanding it is especially important for students in grade 2. To help teachers and students reinforce their understanding of Force, this quiz contains 20 questions related to the topic, with each question accompanied by its answer and an explanatory sentence. Let us begin.

Q1: What is force?

A: A form of energy

B: A motor

C: A machine

D: A law

Answer: A

Explanation: Force is a type of physical energy.

Q2: What are the different types of force?

A: Magnetic, electrical, and gravitational

B: Light, sound, and magnetic

C: Magnetic, sound, and gravitational

D: Electrical, light, and magnetic

Answer: A

Explanation: The three types of force are magnetic, electrical, and gravitational.

Q3: What is Newton’s First Law of Motion?

A: An object in motion will remain in motion

B: Every action has an equal and opposite reaction

C: Force equals mass times acceleration

D: Object will accelerate when acted upon by a net force

Answer: D

Explanation: Newton’s First Law of Motion states that an object will accelerate when acted upon by a net force.

Q4: What is inertia?

A: Resistance to a change in velocity

B: An object in motion will remain in motion

C: A net force

D: Movement of an object

Answer: A

Explanation: Inertia is a property of an object which describes its resistance to a change in velocity.

Q5: What shape is the graph of a force-distance relationship?

A: Parabola

B: Ellipse

C: Hyperbola

D: Straight line

Answer: D

Explanation: The graph of a force-distance relationship is a straight line.

Q6: What is the unit for measuring force?

A: Kilogram

B: Meter

C: Newton

D: Joule

Answer: C

Explanation: Force is measured in Newton (N).

Q7: What is the formula for calculating force?

A: Force equals mass divided by distance

B: Force equals mass times acceleration

C: Force equals distance divided by mass

D: Force equals acceleration times distance

Answer: B

Explanation: The formula for calculating force is Force = Mass x Acceleration.

Q8: What is the force of gravity?

A: 9.81N

B: 12N

C: 9N

D: 11.2N

Answer: A

Explanation: The force of gravity is 9.81N.

Q9: Where is the force of gravity applied?

A: Everywhere in the universe

B: On the surface of the earth

C: On objects with mass

D: On the moon

Answer: C

Explanation: The force of gravity is applied to objects with mass.

Q10: What is the force of friction?

A: The force that opposes the motion of two objects

B: The force that causes objects to accelerate

C: The force that resists motion between two objects in contact

D: The force that causes objects to move in a circular motion

Answer: C

Explanation: The force of friction is the force that resists motion between two objects in contact.

Q11: What is the force of air resistance?

A: The force that resists motion between two objects in contact

B: The force of air that opposes the motion of an object

C: The force that causes objects to accelerate

D: The force that causes objects to move in a circular motion

Answer: B

Explanation: The force of air resistance is the force of air that opposes the motion of an object.

Q12: How does air resistance decrease an object’s speed?

A: It reduces the amount of air around the object

B: It reduces the object’s acceleration

C: It increases the amount of air around the object

D: It increases the object’s acceleration

Answer: B

Explanation: Air resistance decreases an object’s speed by reducing its acceleration.

Q13: What is the force of magnetic attraction?

A: The force of two like magnets attracting one another

B: The force of two unlike magnets repelling one another

C: The force of two opposite magnets attracting one another

D: The force of two like poles repelling one another

Answer: A

Explanation: The force of magnetic attraction is the force of two like magnets attracting one another.

Q14: What is the force of magnetic repulsion?

A: The force of two like magnets attracting one another

B: The force of two unlike magnets repelling one another

C: The force of two opposite magnets attracting one another

D: The force of two like poles repelling one another

Answer: D

Explanation: The force of magnetic repulsion is the force of two like poles repelling one another.

Q15: What is the force of an electric field?

A: The force of two like electric charges repelling one another

B: The force of two opposite electric charges attracting one another

C: The force of two like electric charges attracting one another

D: The force of two opposite electric charges repelling one another

Answer: B

Explanation: The force of an electric field is the force of two opposite electric charges attracting one another.

Q16: What is the unit of work?

A: Kilogram

B: Meter

C: Jaguar

D: Joule

Answer: D

Explanation: Work is measured in Joule (J).

Q17: What is power?

A: The rate of doing work

B: Work done in a given time

C: The force applied to an object

D: The speed of an object

Answer: A

Explanation: Power is the rate of doing work.

Q18: What is the formula for calculating power?

A: Power equals work divided by time

B: Power equals work times acceleration

C: Power equals work multiplied by time

D: Power equals acceleration divided by time

Answer: C

Explanation: The formula for calculating power is Power = Work x Time.

Q19: What is the unit of power?

A: Watt

B: Meter

C: Kilowatt

D: Joule

Answer: A

Explanation: Power is measured in Watt (W).

Q20: What happens when two forces are applied to an object?

A: The object will accelerate

B: The object will move in a straight line

C: The object will remain stationary

D: The object will move in a circular motion

Answer: A

Explanation: When two forces are applied to an object, it will accelerate.