Question

5 Important lines of Motion and Time chapter 13 class 7th​

Answer 1

Answer:

The distance moved by an object in a unit time is called its speed.

The speed of an object  is the distance travelled divided by the time taken to cover that distance. Its basic unit is metre per second (m/s)

Periodic events are used for the measurement of time. Periodic motion of a pendulum has been used to make clocks and watches.

Motion of objects can be presented in pictorial form by their distance-time graphs.

The distance-time graphs for the motion of an object moving with a constant speed is a straight line.

Explanation:

I'm studying in 9th class... But I gave these with the help of my bro's book (he's 7th) so ye hope it helps...

Bye hav a grt day :)