Motion and Time
Boojho & Paheli's Questions Answered
Understanding how things move and how we measure time helps us make sense of the world around us.
P
How was time measured before pendulum clocks?
Before pendulum clocks, people used various methods to measure time:
Historical Timekeeping Methods
- Sundials: Used shadows from the sun to tell time
- Water clocks: Measured time by water flow between containers
- Hourglasses: Used sand flowing through a narrow opening
- Candle clocks: Measured time by wax burning
Sundial
Hourglass
Ancient timekeeping devices
B
Is there a device that measures speed?
Yes, several devices can measure speed:
Speed Measurement Devices
- Speedometer: Measures vehicle speed (in cars, bikes)
- Radar gun: Uses radio waves to measure speed of moving objects
- Anemometer: Measures wind speed
- Speed sensor: Electronic devices that detect rotational speed
Speedometer showing current speed
Odometer
Distance Measurement
00000.0
Kilometers Traveled
Starting journey...
Speed Formula
Speed = Distance ÷ Time
This fundamental formula helps us calculate how fast something is moving.
How Speedometers and Odometers Work
Speedometer
Measures current speed by monitoring wheel rotation. The faster the wheels turn, the higher the speed reading.
Odometer
Counts total wheel rotations to calculate distance traveled. Each full rotation adds a small distance to the total.
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