Question

What is the purpose of using gear system in
1. A toy car
2. A watch

Answer 1

Hint:In a toy car. gear system, helps the input motor to transfer the speed generated by the torque to the output wheels. In a watch, the gear system helps to control the speed of the second hand with the help of other two hands.



Complete step-by-step solution:
In a toy car, a DC motor is installed. In DC motors, the rotation of speed is high but the torque is less. So, this makes it difficult for the DC motor to give initial speed when the toy car is in stationary position. To overcome this [problem, a gear is connected from input motor to the output wheel.
In addition to this, the gears mesh in a way so that the teeth of one-wheel locks into the teeth of another wheel. This makes the wheels stop slipping. It makes power to transmit smoothly and efficiently.
In a watch, all three hands (hour hand, minute hand and second hand) rotate at different speeds. In a watch, accuracy and preciseness is a must. So, the gear ratio method is used to get this accuracy and preciseness. Second hand rotation speed is controlled by the minute and hour hand speed with the help of gear ratio method.
Additional Information: - Gears are also known as simple machines. Gears are used to generate the more speed or more force or send the more force of a machine off in another direction.


Note:- Gear systems are the primary machines known as simple machines. They are used to make balance between input and output. They can control the whole mechanism of the machine and regulate it for efficiency and accuracy.