Total time = 32 seconds
Number of oscillations = 20
Time period = Total time ÷ Number of oscillations
Time period = 32 ÷ 20 = 1.6 seconds
So, the time period of the pendulum is 1.6 seconds.
More Questions on Motion and Time
A car moves with a speed of 40 km/h for 15 minutes and then with a speed of 60 km/h for the next 15 minutes. The total distance covered by the car is:
2Salma takes 15 minutes from her house to reach her school on a bicycle. If the bicycle has a speed of 2 m/s, calculate the distance between her house and the school.
3The odometer of a car reads 57321.0 km when the clock shows the time 08:30 AM. What is the distance moved by the car, if at 08:50 AM, the odometer reading has changed to 57336.0 km? Calculate the speed of the car in km/min during this time. Express the speed in km/h also.
4The distance between two stations is 240 km. A train takes 4 hours to cover this distance. Calculate the speed of the train.
5Which of the following are not correct? (i) The basic unit of time is second. (ii) Every object moves with a constant speed. (iii) Distances between two cities are measured in kilometres. (iv) The time period of a given pendulum is constant. (v) The speed of a train is expressed in m/h.
6Classify the following as motion along a straight line, circular or oscillatory motion: (i) Motion of your hands while running. (ii) Motion of a horse pulling a cart on a straight road. (iii) Motion of a child in a merry-go-round. (iv) Motion of a child on a see-saw. (v) Motion of the hammer of an electric bell. (vi) Motion of a train on a straight bridge.
7A car travels a distance of 120 kilometers in 3 hours. What is its speed in meters per second (m/s)?
8What is meant by periodic motion?
9What does an odometer measure?
10What is a speedometer and what does it measure?
11What is non-uniform motion? Give one example.
12Explain different types of motion with examples.
13Name the instrument used to measure time in a laboratory.
14What is uniform motion? Give one example.
15What is the SI unit of speed?