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- 1. Multiple Choice1. A _________is a simple machine with a fulcrum and a rigid bar.PivotLeverWedge
- 2. Multiple Choice
What is the anticlockwise moment acting on this crane?80,000Nm100,000Nm120,000Nm140,000Nm - 3. Multiple ChoiceUnit of force.MeterCentimeterNewton
- 4. Multiple ChoiceWhat is the moment acting on the seesaw?1.6Nm15Nm16N4Nm
- 5. Multiple ChoiceWhat is the moment produced by the 15 N?15 Nm (clockwise)150 Nm (anti - clockwise)1.5 Nm (anti - clockwise)0.15 Nm (clockwise)
- 6. Multiple ChoiceA seesaw is unbalanced with two people of different masses sitting equal distances from the center. Which of the following will result in equilibrium?The larger person moving further away from the center.Moving the smaller person closer to the center.Moving the smaller person further from the center.Making the larger person do nothing.
- 7. Multiple ChoiceThe easiest way to open a heavy door is by applying the forceNear the hingesIn the middle of the doorAt the edge of the door far from the hingesAt the top of the door
- 8. Multiple ChoiceA wrench is used to tighten a nut. A 15N perpendicular force is applied 50cm away from the axis of rotation, and moves a distance of 10 cm as it turns. What is the torque applied to the wrench?7.5 Nm1.5 Nm750 Nm150 Nm
- 9. Multiple ChoiceThis type of force is an attraction between two objectscontactgravityfriction
- 10. Multiple ChoiceThis type of force resist motion between two surfaces that are pressed togethercontactgravityfriction
- 11. Multiple Choice
If the net force is equal to zero, the forces acting on the object are
balanced
unbalanced
- 12. Multiple ChoiceWhat is the net force?40 N left0 N Balalnced400 N right40 N right
- 13. Multiple ChoiceIf a 10 kilogram object accelerates suddenly at 15 m/s2, how much force was applied to the object?150 Newtons15 Newtons150 kilograms100 kilograms
- 14. Multiple Choice8 N to the left , and 4 N to the right. Find the net force. Is this balanced12 N Right No4 N Left No12 N Right Yes4 N Left Yes
- 15. Multiple ChoiceCalculate the Net Force.40N, Left40N, Right0N, Balanced75N, Right
- 16. Multiple ChoiceWhat is the moment produced by the 15 N?15 Nm (clockwise)150 Nm (anti - clockwise)1.5 Nm (anti - clockwise)0.15 Nm (clockwise)
- 17. Multiple ChoiceA lever is used to raised a mass with a wight of 12 Newtons using only 4 Newtons of force. How many times does the lever multiply the force?124332
- 18. Multiple Choice
A see-saw is made by resting a long plank of wood with its centre of gravity on the barrel.
A boy sits on one side of the barrel and a girl sits on the other side so that the see-saw is balanced.
Which of the following statements must be true?
boy’s weight = girl’s weight
distance x = distance y
moments of the girl = moments of the boy
moment of the girl > moment of the boy
- 19. Multiple Choice
A force is a applied to a long crowbar so as to move a large rock.
Which labelled arrow represents the smallest force needed to move the rock?
A
B
C
D
- 20. Multiple Choice
Which diagram best demonstrates the use of the moment of a force?
A
B
C
D
- 21. Multiple Choice
What is the Unit for moment
Nm
N
W
J
- 22. Multiple ChoiceHow much force is required to accelerate 10 kg at a rate of 100 m/s2?1,000kg10N10kg1,000N
- 23. Multiple ChoiceWhat is the speed of the object represented by the graph?0.5 m/s2 m/s5 m/s4 m/s
- 24. Multiple ChoiceHow are speed and velocity different?Speed includes directionSpeed indicates momentumVelocity includes MomentumVelocity includes direction
- 25. Multiple Choice
A nut can be loosened more easily with
a short spanner because a larger turning effect can be produced.
a long spanner because a larger turning effect can be produced.
a long spanner because a larger force can be produced.
a short spanner because a larger force can be produced.
- 26. Multiple Choice
Jack has a weight of 300 N and sits 2.0 m from the pivot of see-saw. Jill has a weight of 450 N and sits 1.5 m from pivot. Who will move down?
Jack
Jill
Both of them
None of them
- 27. Multiple Choice
How are weight, mass and g related
W=mg
m=Wg
g=Wm
m=W/g
- 28. Multiple Choice
Assuming the system is in equilibrium, calculate the missing distance d
3.4 m
2.8 m
4.4 m
1.6 m
- 29. Multiple Choice
What is the equation for moments?
Moment = force x perpendicular distance from pivot
Moment = mass x velocity
Moment = force x distance
Moment = force x parallel distance from pivot
- 30. Multiple Choice
When an object is in equilibrium, which equation is true?
Clockwise moment = anticlockwise moment
Clockwise moment + anticlockwise moment = 0
Clockwise moment / anticlockwise moment = 0
Clockwise moment + anticlockwise moment = resultant force
- 31. Multiple Choicewhy is the car on the left unstable?Its centre of mass is highit has a narrow baseit has a high heightall of the above
- 32. Multiple Choice
Center of gravity is usually located where
more weight is concentrated
less weight is concentrated
less mass is concentrated
more mass is concentrated
- 33. Multiple ChoiceA basketball with a mass of 0.60 kg is accelerated with a force of 10.8 N. If resisting forces are ignored, what is the acceleration of the basketball to the nearest m/s2?16 m/s217 m/s218 m/s219 m/s2
- 34. Multiple Choice
The figure below shows a man lifting a heavy rock using a steel bar. He pushes downwards on the end of the bar with a force F.
Which pivot positions allows the force F to be as small as possible?
A
B
C
D
- 35. Multiple ChoiceIf the board is 2 meters in length, and and the girl on the left who is 45 kg is far away 0.8 meters from pivot point what is the mass of the girl on the right?20 kg25 kg30 kg35 kg
- 36. Multiple Choice
When an object is moving, friction acts in the _______ direction as the motion.
perpendicular
same
opposite
precise
- 37. Multiple Choice
This motion graph represents:
constant speed
acceleration
body at rest
slowing down
- 38. Multiple ChoiceA wheeled cart is moving to the right at a constant speed. Two forces of equal magnitude are acting upon the cart. Which of the following best describes the forces and motion of the cart?Balanced Forces, Constant SpeedBalanced Forces, AccelerationUnbalanced Forces, Constant SpeedUnbalanced Forces, Acceleration
- 39. Multiple ChoiceWhat does this graph represent?Constant SpeedAccelerationNot moving
- 40. Multiple ChoiceWhich is true from Newton's Third law of motion?For every action force there is a smaller reaction force in the opposite direction.For every action force there is an equivalent reaction force in the opposite direction.Both 1 and 2None of the above
- Answer choicesTagsAnswer choicesTags