A stone is dropped from a height of 20 m above the ground. Will it have a uniform or non-uniform speed, as it moves towards the ground? Open Answer »
With the help of an activity, explain how will you measure the time period of a simple pendulum. Open Answer »
Boojho goes to the football ground to play football. The distance-time graph of his journey from his home to the ground is given in figure.Q1. What does the graph between point B and C indicate about the motion of Boojho? Q2. Is the motion between 0 to 4 minutes uniform or non-uniform? Q3. What is his speed between 8 and 12 minutes of his journey? Open Answer »
Distance between Bholu’s and Golu’s house is 9 km. Bholu has to attend Golu’s birthday party at 7 o’clock. He started from his home at 6 o’clock on his bicycle and covered a distance of 6 km in 40 minutes. At that point he met Chintu and he spoke to him for 5 minutes and reached Golu’s birthday party at 7 o’clock. With what speed did he cover the second part of the journey? Calculate his average speed for the entire journey. Open Answer »
Given below as figure is the distance-time graph of the motion of an object. Q1. What will be the position of the object at 20 s? Q2. What will be the distance travelled by the object in 12 s? Q3. What is the average speed of the object? Open Answer »
Starting from A, Paheli moves along a rectangular path ABCD as shown in figure below. She takes 2 minutes to travel each side. Plot a distance-time graph and explain whether the motion is uniform or non-uniform. Open Answer »
The average age of children of Class VII is 12 years and 3 months. Express this age in seconds. Open Answer »
Complete the data of the table given below with the help of the distance-time graph given in figure.Distance (m)04?12?20Time (s)024?810 Open Answer »
Explain with the help of an example that the states of rest and motion are relative terms. Open Answer »