Replace the hand crank with an engine and gearbox and you can lift even more, but it will take longer again: a pair of gears that can lift twice as much weight take twice as long to do it.Sponsored links Cranes are useful because their lever-beams, pulley-hoists, gears, and hydraulics...
Pulleys are examples of what scientists callsimple machines. That doesn't mean they're packed withenginesandgears; it just means they help us multiply forces. If you want to lift a really heavy weight, there's only so much force your muscles can supply, even if you are the world's stro...
concentrating on the essential features only. For example, while driving a car, a driver only knows the essential features to drive a car such as how to use clutch, brake, accelerator, gears, steering, etc., and least bothers about the internal details of the car like motor, engine, ...
Question: Explain whether or not a mechanical advantage of a simple machine can be less than 1. Mechanical Advantage: Mechanical advantage is used to define the mechanical efficiency of a simple machine. It is basically the ratio of movement of resistance force and the applied...
Use mechanical advantage to explain what happens when you shift the gears of a multispeed bike. Explain, in terms of the definition of power, why energy consumption is sometimes listed in kilowatt-hours rather than joules. What is the relationship between these two energy units? Give a rea...
[C](informal, especiallyAmE)a handle used to change the GEARS of a vehicle for orchestra [C]a BATON, used by the person who CONDUCTS an orchestra criticism [U](BrE, informal)criticism or harsh words:The referee got a lot of stick from the home fans. ...
[C](informal, especially AmE)a handle used to change the GEARS of a vehicle for orchestra [C] a BATON, used by the person who CONDUCTS an orchestra criticism [U](BrE, informal)criticism or harsh words:The referee got a lot of stick from the home fans. country areas (the sticks)...
If you pushed the load across the rough surface of the ground without using a wheelbarrow, the friction would be much greater. Gears Photo: A gear is made from two or more wheels of different sizes with teeth cut into their edges to ensure they "mesh" (turn together without slipping). ...
Quartz watches work in a very different way to pendulum clocks and ordinary watches. They still have gears inside them to count the seconds, minutes, and hours and sweep the hands around the clockface. But the gears are regulated by a tiny crystal of quartz instead of a swinging pendulum ...
But some of the latest electric cars and electric bicycles work a different way. Instead of having one motor powering all the wheels using gears or chains, they build a motor directly into the hub of each wheel—so the motors and wheels are one and the same thing. That's what we mean...