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Newton's Laws and Force Dynamics Quiz

#1

1. Which of Newton's laws states that 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 external force?

First Law
Explanation

Law of Inertia

#2

2. The SI unit of force is:

Newton
Explanation

Named after Sir Isaac Newton

#3

10. What is the unit of measurement for acceleration?

Meter per second squared (m/s²)
Explanation

Acceleration unit

#4

14. What happens to the velocity of an object if the net force acting on it is zero?

Velocity remains constant
Explanation

Zero net force means constant velocity

#5

15. In which scenario is work done by a force?

Lifting a book off the ground
Explanation

Work done against gravity

#6

3. According to Newton's second law, the force acting on an object is equal to the object's:

Mass times acceleration
Explanation

F=ma

#7

4. If an object experiences a net force of 20 N and accelerates at 4 m/s², what is its mass?

5 kg
Explanation

Newton's Second Law calculation

#8

6. Which of the following is a conservative force?

Spring force
Explanation

Energy conservation

#9

7. In the context of force and motion, what does the term 'inertia' refer to?

The tendency of an object to resist a change in its state of motion
Explanation

Resistance to changes in motion

#10

12. What does the term 'net force' represent?

The total force acting on an object
Explanation

Sum of all forces acting on an object

#11

5. Newton's third law states that for every action, there is an equal and opposite:

Reaction
Explanation

Action and Reaction pairs

#12

8. If the net force acting on an object is zero, the object will:

Continue with constant velocity
Explanation

Zero net force implies constant velocity

#13

9. What is the relationship between mass and weight?

Weight is the force exerted by an object, while mass is the amount of matter in an object
Explanation

Weight vs. Mass

#14

11. A rocket is launched into space. According to Newton's third law, what provides the upward force for the rocket to ascend?

Exhaust gases expelled by the rocket
Explanation

Action-reaction in rocket propulsion

#15

20. Which law of motion is described by the equation F = ma?

Second Law
Explanation

Newton's Second Law

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