Speed, Velocity and Acceleration

Define the term non-uniform velocity.

The thunder of cloud is heard $9.8$ seconds later than the flash of lightning. If the speed of sound in air is $330 \mathrm{m} {\mathrm{s}}^{-1}$, what will be the height of cloud in metres?

A ball hits a wall horizontally at $6.0 \mathrm{m} {\mathrm{s}}^{-1}$. It rebounds horizontally at $4.4 \mathrm{m} {\mathrm{s}}^{-1}$. The ball is in contact with the wall for $0.040 \mathrm{s}$. What is the acceleration of the ball?

Select the examples of periodic motion.

Select the examples of circular motion.

Select the examples of straight line motion.

In a non-uniform motion, the _____ of an object keeps on changing while moving along a straight line.

The motion that repeats itself in equal intervals of time is called _____ motion.

If the speed is denoted by S, distance by D, and time by T, then identify the correct relationship between these parameters.

If the speed of an object moving along a straight line remains constant, its motion is said to be _____ motion.

Mandira participated in a 100m race. She took a time of 20s to reach the finish line. What is her speed of running?

Shreya, Ronaldo, Sabina, and Kirti participated in a race. They took 22s, 28s, 20s and 25s respectively to reach the finishing line. Who do you think ran the fastest?

The speed of a vehicle is measured by the _____.

_____ is calculated as the total distance covered divided by the total time taken.

The _____ of objects helps us to decide which one is moving faster than the other.

The motion of a simple pendulum is an example of _____ (periodic/rotatory) motion.

Which of the following relation is correct?

Identify the correct way to represent the unit of speed.

Which of the following statement is correct regarding velocity and speed of a moving body?

Suppose we were to draw a graph of acceleration on the Y axis and time on the X axis and the graph would be a straight line making an angle of 45 degrees with the X axis. Suppose we were to calculate the area under this curve, it would have the dimensions of______.