Available Answers

1. 1.

   Imagine a children's park. You can find different types of activities happening there. Write the types of motion described in the following cases:

   1. See-saw (up and down movement)
   2. Merry-go-round (round and round movement about a fixed axis)
   3. Swing (to and fro movement)
   4. Climbing the spiral ladder (movement in a curved path)
   5. Running on the circular ramp (movement in a circular path)

   

2. 2.

   Fill in the blanks.

   1. When we compare the motion of two or more objects moving in the same direction, we compare their ____________.
   2. When the speed of the object moving along a straight line changes with time, it is said to be in ____________.
   3. Time is the measure of the span or the period between two ____________.
   4. The device that measures the distance covered by the vehicle is called ____________.
   5. The device that calculates the speed of the vehicle is called ____________.
3. 3.

   Give one word for the following:

   1. to and fro motion of a body.
   2. the motion that repeats itself.
   3. the number of oscillations in one second.
   4. the time taken by one complete oscillation.
4. 4.

   Write the formula of speed.

5. 5.

   What is the SI unit of speed? Name a few other units of speed.

6. 6.

   Differentiate between uniform and non-uniform speed.