E. Answer the following questions in detail.
1. Explain speed and average speed with an example. How do they vary?
2. Explain in detail, the working of a sundial.
3. How does a sand clock function?
4. Draw a diagram of a simple pendulum and explain its working.
5. Define the terms speedometer and odometer. How do they vary? Why are they considered
important with respect to vehicles.
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Answers
Answer:
And 1. In simple words, the average speed is the rate at which an object travels and is expressed as the total distance divided by the total time. Average velocity can be defined as the total displacement divided by the total time
Ans 2. A sundial is a device that tells the time of day when there is sunlight by the apparent position of the Sun in the sky. ... The style is the time-telling edge of the gnomon, though a single point or nodus may be used. The gnomon casts a broad shadow; the shadow of the style shows the time.
Ans 3.An hourglass (or sandglass, sand timer, sand clock or egg timer) is a device used to measure the passage of time. It comprises two glass bulbs connected vertically by a narrow neck that allows a regulated flow of a substance (historically sand) from the upper bulb to the lower one.
Ans 4.A pendulum is a rod hanging vertically from its top end (or a weight called a bob hanging from a string) that swings from side to side due to the force of gravity. ... So as the bob swings (oscillates) back and forth, it repeatedly switches its energy back and forth between potential and kinetic.
Ans 5.An instrument on a vehicle's dashboard which indicates the speed of the vehicle when it is running, is called speedometer. The speedometer has the symbol km/h written on its dial. ... Odometer records the distance travelled by a vehicle in kilometres.
Step-by-step explanation:
Hope It will help you
Step-by-step explanation:
1.a.Average Speed:
the average speed is the rate at which an object travels and is expressed as the total distance divided by the total time. Average velocity can be defined as the total displacement divided by the total time.
b.Speed:
Speed is defined as. The rate of change of position of an object in any direction. Speed is measured as the ratio of distance to the time in which the distance was covered. Speed is a scalar quantity as it has only direction and no magnitude.
2.Sundial
A sundial is a device that tells the time of day when there is sunlight by the apparent position of the Sun in the sky. ... The style is the time-telling edge of the gnomon, though a single point or nodus may be used. The gnomon casts a broad shadow; the shadow of the style shows the time.
3.Functioning of Sand Click
An hourglass (or sandglass, sand timer, sand clock or egg timer) is a device used to measure the passage of time. It comprises two glass bulbs connected vertically by a narrow neck that allows a regulated flow of a substance (historically sand) from the upper bulb to the lower one.
4.Working of Pendulum:
A simple pendulum consists of a metal bob hung by a string connected to a pivot point. The bob oscillates in to and fro motion because of its mass and momentum. ... The number of oscillation the pendulum completed in one second is its frequency and the time required for one complete oscillation is called the time period.
5. Speedometer and Odometer:
An instrument on a vehicle's dashboard which indicates the speed of the vehicle when it is running, is called speedometer. The speedometer has the symbol km/h written on its dial. ... Odometer records the distance travelled by a vehicle in kilometres.