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Q1. If force acts but there is no displacement, then:
Work requires both force and displacement. If force acts but there is no displacement, no work is done. For example, pushing a wall that does not move.
Q2. Which is true about work?
Work is a scalar quantity. It has only magnitude and no direction. It does not depend on time or speed.
Q3. A cart moving due to pulling shows:
When a cart is pulled and it moves, force causes displacement. Both conditions for work are satisfied, so work is done.
Q4. One joule is equal to:
One joule is the work done when a force of 1 Newton displaces an object by 1 metre in the direction of the force. So 1 J = 1 N × 1 m.
Q5. The line of action of force matters because:
The line of action of force determines the direction in which the object moves. Work depends on displacement in the direction of force.
Q6. When force acts along displacement, work is taken as:
When force acts in the same direction as displacement, the work done is positive. The angle between them is 0°.
Q7. A girl pulling a trolley that moves shows that:
The girl applies force and the trolley moves. Both force and displacement are present, so work is done.
Q8. Which term is essential in calculating work?
Work requires force and distance moved (displacement). Time and speed are not directly used in the work formula.
Q9. Which of the following is asked to understand work in daily activities?
To understand work in daily activities, we ask what is happening to the object (is it moving?) and why is it happening (what force is applied?).
Q10. If force acts in the direction of displacement, work done is:
When force and displacement are in the same direction, work done is positive. The angle between them is 0°.
Q11. If displacement is zero, the work done is:
If displacement is zero, no work is done regardless of the force applied. Work = Force × Displacement.
Q12. When you push a pebble and it moves, what happens?
When you push a pebble and it moves, force causes displacement. Both conditions are satisfied, so work is done.
Q13. Which quantity is multiplied to find work?
Work is calculated by multiplying force and displacement in the direction of force. Work = Force × Displacement.
Q14. In the formula W = Fs, ‘s’ represents:
In the formula W = F × s, ‘s’ represents displacement in the direction of the force.
Q15. When force and displacement are parallel:
When force and displacement are parallel (same direction), work done is maximum and positive. W = F × s × cos0° = F × s.
Q16. The symbol used for work is:
The symbol for work in physics is ‘W’. Force is represented by ‘F’, displacement by ‘s’, and joule is the unit ‘J’.
Q17. Which of the following is necessary for work to be done?
Both force and displacement are necessary for work to be done. Force without displacement or displacement without force does not constitute work.
Q18. When a baby pulls a toy car forward, the work done is:
The baby applies force forward and the toy car moves forward. Since force and displacement are in the same direction, work done is positive.
Q19. The scientific view of work is:
Scientific work is defined as force causing displacement. It is a physical concept involving force and motion.
Q20. Which of the following best describes scientific work?
Scientific work is defined as the product of force and displacement. It is force causing displacement.
Q21. Work has:
Work is a scalar quantity. It has only magnitude and no direction.
Q22. Work is NOT done when:
If a force acts but the object does not move, no displacement occurs. Without displacement, no work is done.
Q23. Which situation shows NO work done?
When you push a wall and it does not move, there is force but no displacement. Since displacement is zero, no work is done.
Q24. Work in science depends on:
Scientific work depends only on force applied and displacement caused. Time, speed, and mass are not directly part of the work formula.
Q25. If displacement occurs without force, then:
Work requires both force and displacement. If displacement occurs without force, no work is done.
Q26. A force of 5 N moves an object by 2 m. Work done is:
Work = Force × Displacement = 5 N × 2 m = 10 J.
Q27. Work done is 1 J when:
One joule of work is done when a force of 1 Newton moves an object through a distance of 1 metre.
Q28. Which condition alone cannot produce work?
Force alone cannot produce work. Displacement must also occur for work to be done.
Q29. Work is a:
Work is a scalar quantity because it has only magnitude and no direction.
Q30. If force is zero, the work done is:
Work = Force × Displacement. If force is zero, work done is zero regardless of displacement.
Q31. The SI unit of work is:
The SI unit of work is the joule (J). It is named after James Prescott Joule.
Q32. Work done depends on:
Work done depends on the magnitude of force applied and the displacement of the object.
Q33. Increasing displacement while keeping force constant will:
Work = Force × Displacement. If force is constant and displacement increases, work done also increases.
Q34. In day-to-day life, the concept of work involves asking how many main questions?
In everyday life, we ask two main questions about work: (1) What is happening? and (2) Why is it happening?
Q35. In science, work is done only when:
In science, work is done only when a force acts on an object and causes it to be displaced.
Q36. The scientific definition of work ignores:
The scientific definition of work ignores the feeling of effort or tiredness. It only considers force and displacement objectively.
Q37. In pushing a pebble, which two conditions are satisfied?
When pushing a pebble, a force is applied and the pebble moves (displacement occurs). Both conditions for work are satisfied.
Q38. A bullock pulling a cart that moves is an example where:
The bullock applies force and the cart moves. Both conditions for work are satisfied, so work is done.
Q39. The quantity Fs represents:
F × s (force × displacement) represents work done. Work is the product of force and displacement.
Q40. In science, work is defined as:
Work is defined as the product of force and displacement in the direction of force.
Q41. The unit newton metre is also called:
The SI unit of work is the joule (J), which is equivalent to newton metre (N·m).
Q42. Work done is zero when:
If there is no displacement, work done is zero regardless of the force applied.
Q43. What does science mainly consider while defining work?
In science, work is defined as the product of force and displacement in the direction of force.
Q44. Which situation represents work being done?
Work is done when a force causes displacement. Pulling a trolley that moves involves both force and displacement.
Q45. The direction of work is:
Work is a scalar quantity and does not have a direction. It is not defined with a direction.
Q46. The basic requirement for work is:
For work to be done, there must be a force acting on an object and the object must be displaced.
Q47. Which of the following is NOT a condition for work?
The two essential conditions for work are force acting and displacement. Change in colour is not a condition for work.
Q48. Lifting a book through a height is considered work because:
When lifting a book, force is applied upward and the book is displaced upward. Since force causes displacement, work is done.
Q49. The formula for work done is:
The formula for work done is W = F × s, where F is force and s is displacement.
Q50. Work done depends directly on:
Work done is directly proportional to the force applied (W = F × s). For constant displacement, more force means more work.