Physics, asked by rrajaraman75, 8 months ago

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Answered by harshraut2004
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Answer:

1)So, the two natural periodic events which were used in ancient times to measure time were the occurrence of full moon and sunrise. (1) The time from one full moon to the next full moon was called a month. (2) The time from one sunrise to the next sunrise was called a day.

2)The unit which is used to Express speed for fast moving objects is meters per second or m s -1.

3)An instrument for measuring the distance travelled by a wheeled vehicle.

4)The formula for speedis speed = distance ÷ time .

5)The standard unit of speed is metre per second

6)Motion of objects can be presented in pictorial form by their distance-time graphs. The distance-timegraph for the motion of an object moving with a constant speed is a straight line.

7)The device used to measure small interval of time stopwatch.

8)A pendulum is a weight suspended from a pivot so that it can swing freely. When a pendulum is displaced sideways from its resting, equilibrium position, it is subject to a restoring force due to gravity that will accelerate it back toward the equilibrium position.

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Answered by MohnishSingh
0

Answer:

1)Sundial and Sand Clock

2)Km/Hr or M/hr and (Kilometre per hour or Mile per hour).

3)An Odometer is an instrument for measuring the distance travelled by a wheeled vehicle.

4)Speed=Distance/Time

5)s.i unit of Distance=Metre

s.i unit of time=Second

therefore, s.i. unit of speed= m/s

6)Motion of objects can be presented in pictorial form by their distance-time graphs. The distance-time graph for the motion of an object moving with a constant speed is a straight line.

7) Stopwatch

8)A pendulum is a weight suspended from a pivot so that it can swing freely. When a pendulum is displaced sideways from its resting, equilibrium position, it is subject to a restoring force due to gravity that will accelerate it back toward the equilibrium position.

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