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- 1. Multiple Choice
A parachutist of mass 75 kg jumps from a plane at a height of 4 000 m above sea level.
The parachutist falls through a distance of 2 400 m during the first 60 seconds. Calculate the average speed of the parachutist during this time.
20 ms-1
40 ms-1
67 ms-1
80 ms-1
- 2. Multiple Choice
Just after she jumps out of the plane (before the parachute opens). The relative forces will be
Balanced
Unbalanced
- 3. Multiple Choice
Just after she jumps out of the plane (before the parachute opens). The relative forces will be
Weight force is equal to the friction force
Friction force is constant
Weight force is greater that the friction force
Friction force is greater than the weight force
- 4. Multiple Choice
Just after she jumps out of the plane (before the parachute opens). The net force will be
zero
upward
downward
- 5. Multiple Choice
Just after she jumps out of the plane (before the parachute opens). The sky diver will have
a constant speed
a constant acceleration
a constant velocity
- 6. Multiple Choice
After the 60 seconds, the parachutist pulls the cord and opens her parachute.
Explain how the parachute reduces the speed of the parachutist when it is just opened.
The friction force decreases
The weight force decreases
The weight force increases
The friction force increases
- 7. Multiple Choice
Describe the motion at point a. on the graph.constant speedacceleratingdeceleratingstationary - 8. Multiple ChoiceIf this was the journey of a parachutist, what is happening at point e. ?He is deceleratingHe is acceleratingHe has reached a faster constant speedHe has reached a lower constant speed.
- 9. Multiple Choice
The graph shows the vertical speed of a parachutist. At which point did they open the parachute?
A
B
C
D
- 10. Multiple Choice
If a skydiver changes from a vertical to a horizontal position during freefall:
His terminal speed would increase
His terminal speed would decrease
His terminal speed would stay the same
- 11. Multiple Choice
When a parachute canopy is opened more drag is created because:
It has a large mass
It has a large surface area
It is travelling at terminal speed
The person is now vertical
- 12. Multiple Choice
If this graph were to show a parachutist jumping from a plane, how would you describe the forces acting at point B.
His weight is bigger than air resistance
Air resistance is bigger than his weight.
His weight and air resistance are balanced.
- 13. Multiple Choice
Identify true statements:
The parachutist has just left the plane
Weight is increasing
There is no drag
Weight is constant
Deceleration
- 14. Multiple Choice
Identify true statements:
Drag is increasing
Velocity is increasing
There is no drag
Weight is increasing
Deceleration
- 15. Multiple Choice
Identify true statements:
Drag is increasing
Velocity is increasing
Terminal velocity
Acceleration
Maximum drag
- 16. Multiple Choice
Identify true statements:
The parachutist opens their parachute
Deceleration
Terminal velocity
Weight is increasing
Drag is constant
- 17. Multiple Choice
Identify true statements:
Drag is decreasing
Velocity is increasing
Drag is increasing
Velocity is decreasing
Weight is constant
- 18. Multiple Choice
Identify true statements:
Drag is increasing
Velocity is increasing
Terminal velocity
Acceleration
Drag is constant
- 19. Multiple Choice
Terminal velocity.
Select the force arrows that apply:
- 20. Multiple ChoiceA box sliding down an inclined plane attains a velocity of 27 m/s in 3 seconds from rest. Find the acceleration.30 m/s24 m/s29 m/s281 km/hr
- 21. Multiple ChoiceA roller coasters accelerates from an initial velocity of of 6.0 m/s to a final velocity of 70 m/s over 4 seconds. What's the acceleration?24 m/s218 m/s216 m/s216 m/s
- 22. Multiple ChoiceA dog runs with an initial speed of 7.5 m/s on a waxed floor. It slides to a stop in 15 seconds. What is the acceleration?-7.5 m/s-7.5 m/s2-0.5 m/s27.5 mi//hr
- 23. Multiple ChoiceHow fast is the car traveling at 30 seconds?5m/s10m/s20m/s30m/s
- 24. Multiple ChoiceA car starts from rest at a stop light and reaches 20 m/s in 3.5 s. Determine the acceleration of the car.2.2m/s27.0m/s25.7m/s270m/s2
- 25. Multiple ChoiceThe picture of the position vs. time graph shows an object that is...accelerating/speeding upmoving at a constant speednot movingaccelerating/slowing down.
- 26. Multiple ChoiceAcceleration is defined as the CHANGE intime it takes for one place to move to another place.velocity of an object.distance divided by the time intervalvelocity divided by the time interval
- 27. Multiple ChoiceWhy does a car accelerate as it round a corner at a constant speed?Its direction changesIt doesn'tIt slows downIts speeds up
- 28. Multiple ChoiceAcceleration only takes place when things speed up.TrueFalse
- 29. Multiple ChoiceIn each of the following cases, determine where the car has no acceleration ?A car shortly after a stoplight turns green.A car approaching a red lightA car with the cruise control set at 80 km/hA car turning a curve at a constant speed
- 30. Multiple ChoiceDetermine the motion of the car.at restmoving at constant speedspeeding upslowing down
- 31. Multiple ChoiceDetermine the motion of the car.at restconstant velocityspeeding upslowing down
- 32. Multiple ChoiceA roller coasters accelerates from an initial velocity of of 6.0 m/s to a final velocity of 70 m/s over 4 seconds. What's the acceleration?24 m/s218 m/s216 m/s216 m/s
- 33. Multiple ChoiceWhich graph shows the object standing still?ABCD
- 34. Multiple ChoiceWhich graph demonstrates the greatest positive speed?ABCD
- 35. Multiple ChoiceWhich graph represents zero acceleration (constant velocity)?ABCD
- 36. Multiple ChoiceWhich graph represents the greatest acceleration?ABCD
- 37. Multiple Choice
Select the description of motion from A - B.
Slowing down away from the origin
Speeding up away from the origin
Constant velocity away from the origin
Constant velocity towards the origin
- 38. Multiple Choice
What segment of the graph shows no motion, or standing still?
A - B
B - C
C - D
None
- 39. Multiple Choice
True or False: this graph shows several segments ALL with constant velocity.
True
False
- 40. Multiple Choice
Describe motion of C - D.
Constant velocity away from the origin
Slowing down away from the origin
Slowing down away from the origin and then slowing down towards the origin
Slowing down away from the origin and then speeding up towards from the origin
- 41. Multiple Choice
Describe the motion from B - C.
Standing still
Constant velocity of 60 m/min
Constant velocity of 0 m/min
Accelerating
- 42. Multiple Choice
What kind of line on a P-T graph would create the segment B - C on this V-T graph?
Straight, linear line
Horizontal line
Curved line
Wouldn't happen
- 43. Multiple Choice
Segment D - E would have come from what type of P-T graph line?
Straight, linear
Horizontal
Curved
Wouldn't happen
- 44. Multiple Choice
What does a horizontal line (not on the x-axis) mean on a V-T graph?
No movement
Constant velocity
Changing velocity
Change in direction
- 45. Multiple Choice
What is happening at 0 m/min in the middle of segment C - D?
Nothing is happening
Change in speed
Change in position
Change in direction
- 46. Multiple Choice
Which segment shows an object speeding up towards the origin?
A - B above the x-axis
C - D below the x-axis
C-D above the x-axis
D - E
- 47. Multiple ChoiceWhat kind of acceleration is shown here?positivenegativenonevaries
- 48. Multiple ChoiceWhat kind of acceleration is shown here?positivenegativenonevaries
- 49. Multiple ChoiceWhat kind of acceleration is shown here?nonepositivenegativevaries
- 50. Multiple ChoiceWhat is the velocity?not movingincreasingpositivenegative
- 51. Multiple ChoiceWhat is the velocity?positivenegativedecreasingincreasing
- 52. Multiple ChoiceWhat is the velocity?0 m/spositive m/snegative m/sdecreasing
- 53. Multiple ChoiceIs the speed constant or non-constant?constantnon-constant
- 54. Multiple ChoiceIs the speed constant or non-constant?constantnon-constant
- 55. Multiple ChoiceIs the speed constant or non-constant?constantnon-constant
- 56. Multiple ChoiceIs the speed constant or non-constant?constantnon-constant
- 57. Multiple ChoiceWhich section of the graph shows decreasing velocity?CDDEEFGH
- 58. Multiple ChoiceWhich section of the graph shows increasing velocity?ABBCDEEF
- 59. Multiple ChoiceWhich section of the graph shows constant velocity?ABBCEFGH
- 60. Multiple ChoiceWhich section of the graph shows acceleration?ABBCEFFG
- 61. Multiple ChoiceWhich section of the graph shows deceleration?ABBCEFGH
- Answer choicesTagsAnswer choicesTags