893601
Questão 1
Questão
True or false? A moment is a turning effect of a force.
Responda
- True
- False
Questão 2
Questão
Which of these are components of a lever?
Responda
-
Load
-
Work
-
Effort
-
Energy
-
Fulcrum
-
Force
Questão 3
Questão
Which of these is the correct equation for a moment?
Responda
-
Moment = force * distance from line of action
-
Moment = force * perpendicular distance from line of action
-
Moment = force/distance from line of action
-
Moment = force/perpendicular distance from line of action
Questão 4
Questão
True or false? The centre of mass is the point at which the object's weight can be thought to be concentrated.
Responda
- True
- False
Questão 5
Questão
True or false? If an object's centre of mass lies outside the point of suspension, the object is in equilibrium.
Responda
- True
- False
Questão 6
Questão
Where is the centre of mass in a symmetrical object with multiple lines of symmetry?
Responda
-
At a point on one of the lines of symmetry
-
At a point which is not on the lines of symmetry
-
At the point where the lines of symmetry meet
Questão 7
Questão
True or false? The sum of all clockwise moments is always greater than the sum of all anticlockwise moments about a single point in equilibrium.
Responda
- True
- False
Questão 8
Questão
How far from the fulcrum would I place a parcel with weight 20N on a seesaw if there were a parcel with weight 17.5N 4m from the fulcrum?
Responda
-
3m
-
3.5m
-
3.75m
-
3.25m
-
4m
Questão 9
Questão
When will there be a resultant moment causing an object to topple over?
Responda
-
When the centre of mass is within the base
-
When the centre of mass is directly above the base
-
When the centre of mass is outside the base
Questão 10
Questão
Where would you recommend passengers to sit in a double-decker bus to increase its stability?
Responda
-
On the lower deck
-
On the upper deck
Questão 11
Questão
Which of these decrease the stability of an object?
Responda
-
Wide base
-
Narrow base
-
Low centre of mass
-
High centre of mass
Questão 12
Questão
Which of these is the correct equation for pressure?
Responda
-
Pressure = force/area
-
Pressure = area/force
-
Pressure = force * area
Questão 13
Questão
True or false? The pressure in a liquid does not act equally over all directions.
Responda
- True
- False
Questão 14
Questão
What is the force on a load in a hydraulic system if the force on the effort is 20N, the area of the effort is 0.05m^2 and the area of the load is 1.5m^2?
Responda
-
600N
-
60N
-
0.67N
Questão 15
Questão
True or false? Centripetal acceleration acts towards the centre of a circle.
Responda
- True
- False
Questão 16
Questão
True or false? Centripetal force is a force in its own right.
Responda
- True
- False
Questão 17
Questão
Which of these will increase the centripetal force acting upon an object?
Responda
-
Increase in mass
-
Decrease in mass
-
Increase in speed
-
Decrease in speed
-
Increase in radius
-
Decrease in radius
Questão 18
Questão
What type of motion does a simple pendulum follow?
Responda
-
Reciprocating motion
-
Oscillating motion
Questão 19
Questão
True or false? The amplitude of a pendulum is the distance between the equilibrium position and the highest point on either side.
Responda
- True
- False
Questão 20
Questão
True or false? The time period of a pendulum is the time it takes to go from the highest point on one side to the other.
Responda
- True
- False
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