Grade 8 Physics Quiz

Calculating speed using distance and time: What is the formula to calculate speed?

• Speed = Distance * Time

• Speed = Time / Distance

• Speed = Distance - Time

• Speed = Distance / Time

Calculating speed using distance and time: If a car travels 200 miles in 4 hours, what is its speed?

• 100 miles per hour

• 300 miles per hour

• 50 miles per hour

• 25 miles per hour

Calculating speed using distance and time: If a train covers 300 kilometers in 5 hours, what is its speed?

• 60 km/h

• 100 km/h

• 50 km/h

• 200 km/h

Understanding the concept of gravity: What is the acceleration due to gravity on Earth?

• 10.25 m/s^2

• 5.67 m/s^2

• 9.81 m/s^2

• 7.93 m/s^2

Understanding the concept of gravity: What is the difference between mass and weight?

• Mass is the amount of matter in an object, while weight is the force exerted on an object due to gravity.

• Mass is the force exerted on an object due to gravity, while weight is the amount of matter in an object.

• Mass and weight are the same thing and can be used interchangeably.

• Mass is the measure of how heavy an object is, while weight is the amount of space an object takes up.

Understanding the concept of gravity: How does gravity affect objects on the surface of the Earth?

• It pushes objects away from the center of the Earth.

• It pulls objects towards the center of the Earth.

• It has no effect on objects on the surface of the Earth.

• It causes objects to float in the air.

Exploring different types of forces: What is the difference between balanced and unbalanced forces?

• Balanced forces have equal magnitude and opposite direction, resulting in no change in motion. Unbalanced forces have unequal magnitude or are in the same direction, resulting in a change in motion.

• Balanced forces have unequal magnitude or are in the same direction, resulting in a change in motion.

• Unbalanced forces have equal magnitude and opposite direction, resulting in no change in motion.

• Balanced forces have equal magnitude and same direction, resulting in a change in motion.

Exploring different types of forces: Give an example of a contact force and a non-contact force.

• Tension (contact force) and Electrostatic force (non-contact force)

• Normal force (contact force) and Nuclear force (non-contact force)

• Friction (contact force) and Gravity (non-contact force)

• Magnetism (contact force) and Air resistance (non-contact force)

Exploring different types of forces: How does friction affect motion?

• Friction causes objects to float

• Friction has no effect on motion

• Friction increases speed of motion

• Friction creates resistance to motion

Newton's first law of motion: What is Newton's first law of motion also known as?

• law of inertia

• law of energy

• law of motion

• law of gravity