WorksheetsMachine
Total questions: 15
Worksheet time: 12mins
In this image,
the machine is decreasing mechanical advantage
the machine is increasing mechanical advantage
mechanical advantage is not changed
What is the mechanical advantage of the pulley system below?
1
2
3
4
What is the ideal mechanical advantage (IMA) of this pulley?
0
1
2
What is the ideal mechanical advantage of this pulley?
1
2
3
4
What is the ideal mechanical advantage of this pulley system?
4
5
6
7
what will be the effort force needed to lift the 1000gms weight up in the given set up?
500gms
300gms
1000gms
0
What is the VR of a single movable pulley?
(a)
In a single movable pulley if the effort moves by a distance of x upwards, by what height is the load raised?
x/2
2x
2/x
1/2
A pulley system with a velocity ratio 4 is used to lift a load of 300 kgf to a vertical height of 10m by applying an effort of 100 kgf downwards. Find the efficiency of the pulley system and the work done by the effort.
55%
75%
70%
45%
When does a Machine act as a speed multiplier
MA>2
MA=1
MA=2
MA<1
Can a machine act as a force and speed multiplier? explain
If a machine is 70% efficient it implies(multiple answers)
70% is the total energy lost
70% is the total energy is supplied
30% is lost due to friction force
30% energy is saved
give 2 reason why mechanical advantage is less that velocity ratio for an actual machine.
efficiency is the ratio of (multiple answers)
work input / work output
M.A/ V.R
Work output / Work input
M.A x V.R
