F. Short answer questions.
1. Define pulleys.
2. Explain the uses of a wheel and axle arrangement.
3. Explain the working of a wedge.
4. Define a screw with two examples.
5. Explain the working of a knife.
Answers
Answer:
1. A pulley is a wheel that carries a flexible rope, cord, cable, chain, or belt on its rim.
2. Wheel and axle, basic machine component for amplifying force. ... Two wheel and axle arrangements(A) With a large gear and a small gear attached to the same shaft, or axle, a force F applied at the radius R on the large gear is sufficient to overcome the larger force W at the radius r on the small gear, turning the axle.
3. wedge is a triangular shaped tool, and is a portable inclined plane, and one of the six classical simple machines. It can be used to separate two objects or portions of an object, lift up an object, or hold an object in place.
4. screw is a machine and appears like an inclined plane wound around a rod with a pointed tip. For example a jar lid, a drill.
5. Steel blades are commonly shaped by forging or stock removal. Forged blades are made by heating a single piece of steel, then shaping the metal while hot using a hammer or press. Stock removal blades are shaped by grinding and removing metal. With both methods, after shaping, the steel must be heat treated.
Explanation:
1.a piece of equipment, consisting of a wheel and a rope, that is used for lifting heavy things
2.Wheel and axle uses include lifting heavy objects, moving people quickly, and moving parts of a complex machine. There are two basic types of wheel and axle simple machines.
3.A wedge is a triangular shaped tool, and is a portable inclined plane, and one of the six classical simple machines. It can be used to separate two objects or portions of an object, lift up an object, or hold an object in place.
4.A screw is a simple machine which appears like an inclined plane wound around a rod with a pointed tip.
Examples : ajar lid, a drill.
5.Steel blades are commonly shaped by forging or stock removal. Forged blades are made by heating a single piece of steel, then shaping the metal while hot using a hammer or press.
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