Concept of Time

Q.

Which of the following can be used to measure time?

1. Events of sunrise and sunset

2. Occurrence of rainfall

3. The duration between one new moon to the next

4. Spotting of shooting star

Q.

What are parts of the simple pendulum?

Q.

A train moving with uniform speed covers a distance of $120\mathrm{m}$ in$2\mathrm{s}$. Calculate: the time it will take to cover $240m$

Q. A train leaves station A and reaches Station B after 2 hours. If the distance between the station is 180 km, find the speed of the train in km/hr and m/s. [3 MARKS]

Q. A train travels with a speed of 30 kmph. How much time will it take to cover a distance of 180 km?

1. 3 h
2. 6 h
3. 9 h
4. 12 h

Q.

Find the distance covered by a car traveling at a constant speed of 60 m/s in 10 s.

Q. If the time taken by the given pendulum bob to move from point R to P is 3 s, then the time taken by it to complete one oscillation is _____.

Q. What is common among the following images?

1. 
2. 
3. 
4. 

Q. Four cars A, B, C and D are moving on a levelled road. Their distance versus time graphs are shown in the figure. Choose the correct statement.

1. Car A is faster than car D.
2. Car B is the slowest.
3. Car C is the slowest.
4. Car D is faster than car C.

Q. Time is given by:

1. Time = Distance x Speed
2. $Time=\frac{Speed}{Distance}$
3. $Time=\frac{Distance}{Speed}$
4. $\frac{1}{Time}=\frac{Distance}{Speed}$

Q. A pendulum completes 120 oscillations in 40 s. The time period of the pendulum is

1. 1/3 s
2. 4 s
3. 3 s
4. 1/4 s

Q. Ramesh runs 50 m in 10 s. Calculate the speed of Ramesh.

1. 4 m/s
2. 8 m/s
3. 5 m/s
4. 10 m/s

Q. Time is expressed in the unit of

1. kg
2. m
3. km
4. s