Pulley
Trending Questions
- Inclined plane
- Lever
- Pulley
- Screw
How do machines make our work easier? Give an example.
A steering wheel of a car is an example of a pulley.
- True
- False
In a single movable pulley, if the effort moves by a distance x upwards, by what height is the load raised?
x5
x4
x2
x8
A uniform rod 2 m long has weights of 5 gf and 30 gf at its ends. If it balances 50cm from one end, what is the weight of the rod?
25gf
15gf
18gf
10gf
Question 18
A chapati maker is a machine which converts balls of dough into chapatis. What effect of force comes into play in this process?
There are four kinds of simple machines.
- True
- False
- 4
- Wheel
- Load
- Rope
- Fulcrum
What is Tension?
- 0.064 m
- 64 m
- 640 cm
- 64 cm
In a _______ pulley, the pulley is attached to a hook or a wall and does not move.
A constant force of is used to lift a box to a height of . This takes with the help of a small crane. How much minimum power was the crane using?
Which of the following is a unit of moment of force?
N-m
N-kg2
N-kg
N-m2
- A
- B
- C
- D
- 0.857
Choose the correct one from the following.
A simple machine is a device that changes the direction or magnitude of a force.
A simple machine is a device that has only one pulley.
A simple machine is a device that increases human efforts.
A simple machine is a device that always maintains the magnitude of a force.
- True
- False
Which of the following should be used to lift a heavy steel cupboard to the fourth floor of the building?
Lever
Pulley
Inclined plane
Wedge
- True
- False
- −75 J
- 75 J
- −25 J
- 25 J
- 2
- 4
- 5
- Nut cracker
- Crane
- Cable pulley
- Flagpole
- Well pulley
- Hinged oar
- Window blinds
- Garage doors
Which type of pulley is helpful in changing the direction of effort?
Fixed pulley
Movable pulley
Compound pulley
Triple pulley
Two bodies of equal weight are kept at heights of h and 1.5h respectively. The ratio of their P.E. is:
- 2:3
- 3:2
- 1:1
- None of these