Physics Questions With Answers
1. weight: force a body exerts due to the pull of gravity
2. mass: the measure of the amount of material in a body
3. weight=: mass x velocity
4. objects are stable if: lower
com large surface area
5. objects will topple if: vertical line through the com falls outside
the base a moment is produced which causes the object to rotate
6. com is: the point where all the mass of that object may be considered to be
7. balance at com because: the moments on each side are equal
8. density is: mass per unit volume
9. density=: mass/volume
10. density tells us: how closely the particles are packed
11. friction is: a force that opposes motion
12. air resistance or drag: occurs when the object moves through air or fluid
13. reduce friction by:
lubrication changing the material
or fluid
rollers
streamlinin
g
14. friction acts in the: opposite direction of the object
15. friction exists: when two surfaces move over each other
16. a force can: change the
direction of motion change the shape of
things
start objects moving and slowing down
17. 2 main groups: contact and distant
18. contact: forces touch the object and produce a change of shape or state of motion
19. distant: forces act at a distance
20. 1st law: a body will remain at rest or move at a constant velocity if the resultant force acting
on the body is zero
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, 21. balanced forces exist when: two forces act in opposite directions but are the sam
size
22. 2nd law: if a resultant force acts on a body the body will not remain at rest or move at
constant velocity, it will accelerate
23. resultant force=: mass x acceleration
24. principal of moments: when a object is balanced, the total sum of the clockwise
moments is equal to the sum of the anticlockwise moments, about the pivot
25. distance is: ground covered
26. displacement is: shortest distance from start to finish in a certain direction
27. speed is: rate of change of distance
28. velocity is: rate of change in displacement
29. acceleration is: rate of change in velocity
30. scalar: magnitude
31. vector: magnitude and direction
32. acceleration=: velocity/time
33. unit of acceleration: m/s²
34. moment=: force x distance
35. unit of moments: newton metre
36. unit of density: kg/m³
37. size of moment depends on: size
of force distance of force from pivot
38. centrepedal force depends on: mass
of object speed of object
radius of orbit
39. momentum: amount of movement in a body
40. unit of momentum: kgm/s²
41. change in momentum=: force x distance
42. momentum depends
on: mass velocity
43. momentum=: mass x velocity
44. principle of momentum: when two bodies collide, the total momentum remains
constant, providing that there are no external forces acting
45. energy types:
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1. weight: force a body exerts due to the pull of gravity
2. mass: the measure of the amount of material in a body
3. weight=: mass x velocity
4. objects are stable if: lower
com large surface area
5. objects will topple if: vertical line through the com falls outside
the base a moment is produced which causes the object to rotate
6. com is: the point where all the mass of that object may be considered to be
7. balance at com because: the moments on each side are equal
8. density is: mass per unit volume
9. density=: mass/volume
10. density tells us: how closely the particles are packed
11. friction is: a force that opposes motion
12. air resistance or drag: occurs when the object moves through air or fluid
13. reduce friction by:
lubrication changing the material
or fluid
rollers
streamlinin
g
14. friction acts in the: opposite direction of the object
15. friction exists: when two surfaces move over each other
16. a force can: change the
direction of motion change the shape of
things
start objects moving and slowing down
17. 2 main groups: contact and distant
18. contact: forces touch the object and produce a change of shape or state of motion
19. distant: forces act at a distance
20. 1st law: a body will remain at rest or move at a constant velocity if the resultant force acting
on the body is zero
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8
, 21. balanced forces exist when: two forces act in opposite directions but are the sam
size
22. 2nd law: if a resultant force acts on a body the body will not remain at rest or move at
constant velocity, it will accelerate
23. resultant force=: mass x acceleration
24. principal of moments: when a object is balanced, the total sum of the clockwise
moments is equal to the sum of the anticlockwise moments, about the pivot
25. distance is: ground covered
26. displacement is: shortest distance from start to finish in a certain direction
27. speed is: rate of change of distance
28. velocity is: rate of change in displacement
29. acceleration is: rate of change in velocity
30. scalar: magnitude
31. vector: magnitude and direction
32. acceleration=: velocity/time
33. unit of acceleration: m/s²
34. moment=: force x distance
35. unit of moments: newton metre
36. unit of density: kg/m³
37. size of moment depends on: size
of force distance of force from pivot
38. centrepedal force depends on: mass
of object speed of object
radius of orbit
39. momentum: amount of movement in a body
40. unit of momentum: kgm/s²
41. change in momentum=: force x distance
42. momentum depends
on: mass velocity
43. momentum=: mass x velocity
44. principle of momentum: when two bodies collide, the total momentum remains
constant, providing that there are no external forces acting
45. energy types:
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