Rest And Motion - Free MCQ Practice Test with solutions, Class 9

In this case
Displacement = hypotenuse
Displacement = (8² +6²)^1/2 = 10 m

"Displacement will be zero because displacement is the difference between initial and final position but after one revolution the second hand came to its initial position; so it's final and initial position is same so displacement is zero "

His displacement will be zero although distance covered is non-zero since he ends up where he started.

Displacement can be zero but distance cannot be zero because distance is the total path covered but displacement is the shortest distance between the initial and final position. It can be zero at the end of one round.

The car's movement can be summarised as follows:

• It travels 60 km to the East.
• Then, it moves 90 km to the West.

To find the total distance covered:

• The distance travelled East is 60 km.
• The distance travelled West is 90 km.

Thus, the total distance is:

• 60 km + 90 km = 150 km.

Therefore, the total distance covered by the car is 150 km.

Non Uniform motion is defined as the motion of an object in which the object travels with varied speed and it does not cover same distance in equal time intervals, irrespective of the time interval length.

Examples:

1. If a car covers 10 meters in first two seconds, and 15 meters in next two seconds.

2. The motion of a train.