Motion and Its Description
NIOS · Class 10 · Science & Tech
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See them allA bus travels 120 km in 2 hours, then stops for 30 minutes, then travels another 80 km in 1.5 hours. What is the average speed of the bus for the entire journey?
Answer
Total distance = 120 + 80 = 200 km Total time = 2 + 0.5 + 1.5 = 4 hours Average speed = Total distance ÷ Total time = 200 km ÷ 4 hours = 50 km/h Note: Average speed considers the total journey time i…
Why does a passenger in a moving train feel that trees are moving backward?
Answer
This demonstrates relative motion. The passenger is moving forward with the train, so relative to the passenger, the stationary trees appear to move backward at the same speed as the train moves forwa…
What happens to distance and displacement when you walk from your home to school and then return home?
Answer
Distance: Adds up the total path traveled = Distance to school + Distance back home = 2 × (distance between home and school) Displacement: Final position - Initial position = 0 (since you end up wher…
What is the difference between uniform and non-uniform motion?
Answer
Uniform Motion: Object covers equal distances in equal intervals of time. Example: A car moving at constant 60 km/h on a straight highway. Non-uniform Motion: Object covers unequal distances in equal…
A car accelerates from rest to 72 km/h in 10 seconds. Calculate its acceleration.
Answer
Given: Initial velocity (u) = 0 (starts from rest) Final velocity (v) = 72 km/h = 72 × (5/18) = 20 m/s Time (t) = 10 s Using equation: a = (v - u)/t a = (20 - 0)/10 = 2 m/s² This means the car's vel…
Why do we feel pushed backward when a bus suddenly starts moving forward?
Answer
This occurs due to inertia and relative motion. When the bus accelerates forward, our body tends to remain at rest due to inertia. Relative to the accelerating bus, we appear to move backward. This d…
What type of motion does the tip of a fan blade have when the fan is rotating?
Answer
Circular Motion - The tip of the fan blade moves in a circular path around the center of the fan. This is uniform circular motion when the fan rotates at constant speed, because: - The tip covers equ…
What is meant by saying 'motion is relative'?
Answer
Motion is relative means that whether an object is in motion or at rest depends on the observer's frame of reference. Example: Two trains moving parallel at the same speed appear stationary to passen…
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