Laws of Motion Practice Questions
Class 11 · Physics · 905 free MCQs with instant results and detailed explanations.
905
Total
503
Easy
331
Medium
71
Hard
Start Practicing Laws of Motion
Take a timed quiz or customize your practice session
Topics in Laws of Motion
Momentum
149
Newton's Laws
202
Circular Motion
213
Friction
191
Impulse
150
Sample Questions from Laws of Motion
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
Which of Newton's laws explains why a passenger lurches forward in a bus that suddenly stops?
A.
First Law
B.
Second Law
C.
Third Law
D.
Law of Gravitation
Show Answer & Explanation
Correct Answer: A
Newton's First Law states that an object in motion stays in motion unless acted upon by an external force. The passenger continues moving forward due to inertia when the bus stops.
Q2
Easy
According to Newton's Third Law, if you push against a wall, what happens?
A.
The wall moves
B.
You move backwards
C.
The wall exerts an equal force on you
D.
Nothing happens
Show Answer & Explanation
Correct Answer: C
Newton's Third Law states that for every action, there is an equal and opposite reaction. The wall pushes back with an equal force.
Q3
Easy
What is the inertia of an object primarily dependent on?
A.
Shape
B.
Mass
C.
Volume
D.
Density
Show Answer & Explanation
Correct Answer: B
Inertia is directly proportional to mass. More massive objects have greater inertia and resist changes in their state of motion.
Q4
Medium
Which of the following statements is TRUE regarding Newton's third law of motion?
A.
For every action, there is an equal and opposite reaction.
B.
An object at rest stays at rest unless acted upon.
C.
Force equals mass times acceleration.
D.
All forces are contact forces.
Show Answer & Explanation
Correct Answer: A
Newton's third law states that for every action, there is an equal and opposite reaction.
Q5
Medium
Which of the following scenarios illustrates Newton's first law of motion?
A.
A car accelerates when the driver steps on the gas.
B.
A book remains on a table unless pushed.
C.
A ball rolls down a hill.
D.
A rocket takes off.
Show Answer & Explanation
Correct Answer: B
Newton's first law states that an object at rest remains at rest unless acted upon by a net external force.
Q6
Medium
In a frictionless environment, if two equal masses collide elastically, what can be said about their velocities after the collision?
A.
They exchange velocities.
B.
They stick together.
C.
Their velocities remain unchanged.
D.
One object becomes stationary.
Show Answer & Explanation
Correct Answer: A
In elastic collisions, equal masses exchange velocities while conserving momentum and kinetic energy.
Q7
Medium
An object is in motion, and no net external force is acting on it. What will happen to its velocity?
A.
It will remain constant.
B.
It will increase.
C.
It will decrease.
D.
It will stop.
Show Answer & Explanation
Correct Answer: A
According to Newton's First Law, an object at rest or in motion will remain in that state unless acted upon by an external force.
Q8
Hard
A freely falling object reaches a speed of 30 m/s after falling for 3 seconds. What is the acceleration due to gravity?
A.
5 m/sĀ²
B.
8 m/sĀ²
C.
10 m/sĀ²
D.
15 m/sĀ²
Show Answer & Explanation
Correct Answer: C
Using a = (v - u)/t and u = 0, v = 30 m/s, t = 3 s, we find a = 10 m/sĀ².
Q9
Hard
A rocket accelerates upward with an acceleration of 10 m/sĀ² while overcoming its weight. If the mass of the rocket is 1000 kg, what is the thrust force exerted by the engines?
A.
10000 N
B.
11000 N
C.
9000 N
D.
12000 N
Show Answer & Explanation
Correct Answer: B
Thrust must counteract gravity and provide upward acceleration: Thrust = weight + ma = 9800 N + 10000 N = 11000 N.
Q10
Hard
An object moving in a circular path at a constant speed experiences which type of force?
A.
Centripetal force
B.
Frictional force
C.
Gravitational force
D.
Normal force
Show Answer & Explanation
Correct Answer: A
An object moving in a circular path requires a centripetal force directed towards the center of the circular path to maintain its motion.
Showing 10 of 905 questions. Start a quiz to practice all questions with scoring and timer.
Practice All 905 Questions →More Physics Chapters
Other Class 11 Subjects
Laws of Motion ā Class 11 Physics Practice Questions Online
This page contains 905 practice MCQs for the chapter Laws of Motion in Class 11 Physics. The questions are organized by difficulty ā 503 easy, 331 medium, 71 hard ā so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 5 topics, giving you comprehensive coverage of the entire chapter.