Work-energy Via Newton’s Laws
A 2 kg block is pushed across a rough horizontal surface by a 16 N force. It moves at constant velocity. What is the coefficient of kinetic friction? (g = 10 m/s²)
Select the correct option:
🔒 Solution Hidden from View
Submit your answer to unlock the detailed step-by-step solution.
More laws of motion Practice Questions
A block of weight 50 N rests on a horizontal floor while an external force of 20 N is applied on it ...
A block of weight 50 N rests on a horizontal floor while an external force of 20 N is applied on it ...
A pendulum hangs from the roof of a railway carriage that is accelerating horizontally, and the stri...
A pendulum hangs from the roof of a railway carriage that is accelerating horizontally, and the stri...
The linear momentum of a moving particle varies with time according to the relation p = 8 + 6t, wher...
The linear momentum of a moving particle varies with time according to the relation p = 8 + 6t, wher...
A block placed on a rough inclined plane remains on the verge of sliding when the incline is tilted ...
A block placed on a rough inclined plane remains on the verge of sliding when the incline is tilted ...
A wooden block resting on a rough horizontal floor just begins to slide when a horizontal pull equal...
A wooden block resting on a rough horizontal floor just begins to slide when a horizontal pull equal...
A small box slides down a smooth incline that makes an angle of 30 degrees with the horizontal surfa...
A small box slides down a smooth incline that makes an angle of 30 degrees with the horizontal surfa...
Two blocks of masses 3 kg and 2 kg are connected by a light string and pulled along a smooth horizon...
Two blocks of masses 3 kg and 2 kg are connected by a light string and pulled along a smooth horizon...
A person of mass 70 kg stands on a weighing scale inside a lift that accelerates upward at 2 m/s² wh...
A person of mass 70 kg stands on a weighing scale inside a lift that accelerates upward at 2 m/s² wh...
A stone of mass 0.5 kg is whirled in a horizontal circle of radius 1 m at a constant speed of 4 m/s ...
A stone of mass 0.5 kg is whirled in a horizontal circle of radius 1 m at a constant speed of 4 m/s ...
A car negotiates a curved road of radius 100 m that is banked at an angle so that no friction is nee...
A car negotiates a curved road of radius 100 m that is banked at an angle so that no friction is nee...
A football of mass 0.4 kg is kicked from rest and leaves the foot with a speed of 25 m/s after the f...
A football of mass 0.4 kg is kicked from rest and leaves the foot with a speed of 25 m/s after the f...
A hockey puck sliding across rough ice with an initial speed of 12 m/s comes to rest after travellin...
A hockey puck sliding across rough ice with an initial speed of 12 m/s comes to rest after travellin...
About This Question
- Subject
- physics
- Chapter
- laws of motion
- Topic
- work-energy via newton’s laws
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
0.80
- Equilibrium Condition: 'Constant velocity' means zero acceleration (a=0). By Newton's First Law, net force must be zero.
- Force Balance:
- Applied Force (F) = Kinetic Friction (fk)
- 16 N =μkN.
- Normal Force: On a horizontal surface, N=mg=2×10=20 N.
- Solve for Coefficient:
- 16=μk×20
- μk=2016=108=0.80.
- Result: The coefficient of kinetic friction is 0.80.
This easy difficulty physics question is from the chapter laws of motion, covering the topic of work-energy via newton’s laws. It appeared in the 2025 exam.
Looking for more practice? Explore all physics questions or browse laws of motion questions on RankGuru.