Pick out the vector quantity from the following.
distance
power
speed
moment
What are the two variables which determine the mechanical advantage of a simple machine?
speed, force
force, distance
acceleration, power
power, distance
The algebraic sum of the moments of force about any point in that plane is equal to _________.
1
100
zero
180
Two boys are carrying a load of 900N on a stick between them. The length of the stick from the load to one end is 2m and the length from the load to the other end is 3m. Calculate what part of the load each boy carries.
600N and 300N
360N and 600N
540N and 600N
540N and 360N
Pick out the instrument which uses gears from the following .
Scissors
Screw driver
Forceps
Hand-drill
A _____________ is a pair of equal, unlike, parallel, forces which acting on a rigid body at different points produce a turning effect in the same direction.
moment of force
torque
gears
couple
If the mechanical advantage of a simple machine is 4, then the
output is 4 times the effort
effort is 4 times the the output force
efficiency is 4%
the work output is 4 times the input
Which of the following is not considered as a simple machine.
Wedge
Pulley
Wheel barrow
Lever
The distance between two consecutive threads of a screw is called _____________.
pitch
gear
The mechanical advantage of a compound machine is determined by __________________.
adding the mechanical advantage for each simple machine
finding the simple machine with the largest mechanical advantage
finding the average mechanical advantage for the simple machines
multiplying the mechanical advantage for each simple machine
