Grade 12 General Physics Quiz

1. What is the formula for calculating force?

• force = mass x acceleration

• force = mass - acceleration

• force = mass / acceleration

• force = mass + acceleration

2. Define Newton's first law of motion.

• An object at rest will stay at rest, and an object in motion will stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

• An object in motion will change direction on its own

• An object at rest will start moving on its own

• An object in motion will eventually come to a stop

3. What is the difference between mass and weight?

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

• Mass is measured in pounds, while weight is measured in kilograms.

• 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.

4. Explain the concept of inertia.

• The tendency of an object to float in water

• The tendency of an object to change color

• The tendency of an object to speed up

• The tendency of an object to resist changes in its state of motion.

5. How does friction affect motion?

• Friction causes objects to float

• Friction opposes the motion of an object

• Friction has no effect on motion

• Friction increases the speed of an object

6. What is the formula for calculating acceleration?

• a = (v_f - v_i) / t

• a = (v_f * v_i) / t

• a = (v_f + v_i) / t

• a = (v_f - v_i) * t

7. Describe the relationship between force, mass, and acceleration.

• Force is directly proportional to mass and acceleration.

• Force is inversely proportional to mass and acceleration.

• Force is directly proportional to acceleration but inversely proportional to mass.

• Force is directly proportional to mass but inversely proportional to acceleration.

8. Explain the concept of momentum.

• Momentum is the product of an object's weight and its acceleration.

• Momentum is the product of an object's mass and its velocity.

• Momentum is the product of an object's force and its distance.

• Momentum is the product of an object's speed and its time.

9. What is the difference between elastic and inelastic collisions?

• Kinetic energy conservation

• Friction conservation

• Potential energy conservation

• Momentum conservation

10. Define the principle of conservation of energy in the context of mechanics.

• Energy increases over time

• Total energy of an isolated system remains constant over time

• Energy is not related to the motion of objects

• Energy decreases over time