Olympiad Test: Motion and Measurement of Distances - Class 6 MCQ

let suppose they both took 1hrs.
Prem covered distance = 2km
prem's speed = 2km / hr
Raju covered distance = 4km
raju's speed = 4km / hr
so from here , it is clear that raju covered 4km with speed of 4km/hr which is more than prem by distance and speed.

Accuracy in measurement using a ruler is essential. Keeping your eye vertically above the point where the measurement is taken reduces parallax error, ensuring precise measurements.

The movement of a person on the road is an example of linear motion, not rotational motion.

The motion described in the scenario is an example of non-uniform motion.
Non-uniform motion occurs when an object travels unequal distances in equal intervals of time. In this case, the car covers a distance of 40 km in the first hour and 50 km in the second hour. The distances covered in each hour are different, indicating that the car is not moving at a constant speed. If it were moving at a constant speed, it would cover the same distance in each hour.
Uniform motion, on the other hand, would involve the object covering equal distances in equal intervals of time. Periodic motion refers to motions that repeat at regular intervals, like the motion of a pendulum. Rotational motion involves objects spinning or rotating around an axis, which is not described in the given scenario. Therefore, the correct answer is B) Non-uniform motion.

Given that a gram has been divided into 1000 equal parts, each part would be equal to one milligram (option C).
Here's the breakdown of metric units of mass:

• 1 kilogram (kg) = 1000 grams (g)
• 1 gram (g) = 1000 milligrams (mg)

Therefore, dividing a gram into 1000 equal parts results in each part being equal to one milligram.

To find the speed of the person in kilometers per hour (km/h), we can use the formula for speed:

Given:
Distance = 45 meters
Time = 9 seconds
Firstly, we need to convert the distance from meters to kilometers and time from seconds to hours because the answer is required in km/h.
1 kilometer = 1000 meters (conversion factor)

1 hour = 3600 seconds (conversion factor)

Now, let's use the formula for speed:

Therefore, the speed of the person covering the distance from X to Y is 18 km/h (option A).

correct answer is C. As the truck is moving with a uniform speed , so it will cover equal distances in equal time intervals which is represented by a straight line on Distance -Time Graph.

As the Y- coordiante is constant , so there is no change in distance , so body is at rest