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Questions and Answers
An iron ball and a wooden ball of the same radius are released from a height H in a vacuum. Which statement is correct about the times taken for them to reach the ground?
An iron ball and a wooden ball of the same radius are released from a height H in a vacuum. Which statement is correct about the times taken for them to reach the ground?
A stone is dropped from a bridge and takes 2 seconds to reach the water. Given that g = 9.8 m/s², what is the height of the bridge above the water?
A stone is dropped from a bridge and takes 2 seconds to reach the water. Given that g = 9.8 m/s², what is the height of the bridge above the water?
An object is dropped. What is its velocity after 5 seconds, assuming the acceleration due to gravity is 10 m/s²?
An object is dropped. What is its velocity after 5 seconds, assuming the acceleration due to gravity is 10 m/s²?
50 m/s
The time it takes for an object to fall a certain distance is directly proportional to the square of the distance.
The time it takes for an object to fall a certain distance is directly proportional to the square of the distance.
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If an object is dropped from a height of 80 meters, the time of flight is ______ seconds, given that g = 10 m/s².
If an object is dropped from a height of 80 meters, the time of flight is ______ seconds, given that g = 10 m/s².
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A body is projected vertically upwards with a velocity u and returns to the starting point in 4 seconds. Assuming g = 10 m/s², the value of u is:
A body is projected vertically upwards with a velocity u and returns to the starting point in 4 seconds. Assuming g = 10 m/s², the value of u is:
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A stone is dropped from the top of a tower. Its speed after it has fallen 20 m is [Take g = 10 ms⁻²]
A stone is dropped from the top of a tower. Its speed after it has fallen 20 m is [Take g = 10 ms⁻²]
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Match the following scenarios with the correct time to hit the ground when dropped from the given height:
Match the following scenarios with the correct time to hit the ground when dropped from the given height:
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Study Notes
Motion in a Straight Line
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Q1: Iron and wooden balls of same radius, dropped from same height in vacuum, reach the ground in equal time.
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Q2: A stone dropped from a bridge takes 2 seconds to hit the water. The height of the bridge is 19.6 meters (using g = 9.8 m/s²).
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Q3: A stone dropped from a tower, after falling 20 meters, has a speed of 20 m/s (using g = 10 m/s²).
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Q4: The ratio of times taken by two bodies of different masses to fall through different distances depends on the distances (a and b). It's equal to √a/√b.
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Q5: The time taken to cover the first half of a falling body's height is calculated by √((time to cover the full height)/2).
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Q6: A body projected upward with a velocity 'u', returning to the starting point after 4 seconds (with g = 10 m/s²) means initial velocity was 20 m/s.
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Q7: An object dropped takes 5 seconds to reach a certain velocity which is 50 m/s.
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Q8: The displacement of a dropped object in the 4th second is 28 meters.
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Q9: If an object is dropped from a height of 80 meters, its time of flight is 4 seconds.
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Q10: The second drop is 3.75m above the ground while the first drop hits the ground.
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Q11: A body falling from a tower takes the last 2 seconds to fall 40 meters. The height of the tower is accordingly 80 meters.
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Q12: A boy drops a stone from a 20-meter tower. The velocity of the stone hitting the ground is 20 m/s (using g =10 m/s²).
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Q13: A ball is dropped and another thrown. They both drop from the same platform. The time is 6 seconds.
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Description
Test your understanding of motion in a straight line with this quiz. Explore concepts of free fall, gravitational acceleration, and the relationship between distance and time. Perfect for students studying classical mechanics in physics.
