Which of the following should be used to lift a heavy steel cupboard to the fourth floor of the building?
Which type of pulley is helpful in changing the direction of effort?
Q. An ideal pulley system can lift a load of 1500 N by an effort of 300 N. The velocity ratio of the system is
Q. Which of the following primarily changes the direction of the effort applied?
- Lever II
- Lever I
Q. A heavy block from the ground can easily be lifted up to a higher floor of a building using:
- Inclined plane
Q. A pulley is a wooden or a metallic disc with a grooved ring and a rope around it.
Q. Tension always acts as a pulling force.
Q. Geetu draws water from a well using a fixed pulley. The mass of the bucket and water together is 6 kg. If the force applied by her is 70 N, calculate the mechanical advantage. (Take g=10 m s−2)
Q. If an ideal pulley system can lift a load of 2000 N by an effort of 500 N. Find its velocity ratio.
Q. Which of the following uses a pulley system?
- Nut cracker
- Cable pulley
- Well pulley
- Hinged oar
- Window blinds
- Garage doors