Vertical Motion, Braking Distance & Galileo's Law of Odd Numbers

 

Worksheet: Vertical Motion, Braking Distance & Galileo's Law of Odd Numbers

Instructions

• Choose the most appropriate answer.
• Take acceleration due to gravity $g = 10\,\text{m/s}^2$ unless otherwise stated.

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1. A ball is thrown vertically upward from the ground with a speed of 20 m/s. The maximum height reached is

A) 10 m

B) 20 m

C) 30 m

D) 40 m

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2. A ball is thrown upward with a speed of 30 m/s. The time taken to reach the highest point is

A) 2 s

B) 3 s

C) 4 s

D) 5 s

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3. A ball is thrown upward from the ground with 25 m/s. Its velocity after 2 s is

A) 5 m/s upward

B) 10 m/s upward

C) 15 m/s upward

D) 5 m/s downward

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4. A ball is thrown vertically downward from the top of a 60 m building with an initial speed of 5 m/s. The speed just before hitting the ground is

A) 25 m/s

B) 30 m/s

C) 35 m/s

D) 40 m/s

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5. A ball is projected upward from the top of a 20 m building with 20 m/s. The maximum height above the ground is

A) 20 m

B) 30 m

C) 40 m

D) 50 m

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6. A ball is dropped from a height of 80 m. The time taken to reach the ground is

A) 2 s

B) 3 s

C) 4 s

D) 5 s

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7. A ball is thrown downward from a 60 m building with 5 m/s. The time taken to reach the ground is

A) 2 s

B) 3 s

C) 4 s

D) 5 s

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8. A driver has a reaction time of 0.8 s. The car is moving at 25 m/s. The reaction distance is

A) 10 m

B) 15 m

C) 20 m

D) 25 m

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9. A car moving at 20 m/s takes 4 s to stop after brakes are applied. The braking distance is

A) 20 m

B) 30 m

C) 40 m

D) 50 m

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10. If the reaction distance is 18 m and braking distance is 32 m, the stopping distance is

A) 32 m

B) 40 m

C) 50 m

D) 60 m

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11. The displacement during the 5th second of free fall is

A) 25 m

B) 35 m

C) 45 m

D) 50 m

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12. A body starts from rest. The displacement during the 8th second is

A) 55 m

B) 65 m

C) 75 m

D) 85 m

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13. According to Galileo's Law of Odd Numbers, the distances covered in successive seconds are proportional to

A) 1 : 2 : 3 : 4

B) 1 : 3 : 5 : 7

C) 2 : 4 : 6 : 8

D) 1 : 4 : 9 : 16

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14. A freely falling body covers 9 m during the first second. According to Galileo's law, the distance covered during the fourth second is

A) 27 m

B) 45 m

C) 63 m

D) 81 m

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15. A ball thrown upward returns to the point of projection after 8 s. Its initial speed is

A) 20 m/s

B) 30 m/s

C) 40 m/s

D) 50 m/s

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16. A ball is projected upward with 40 m/s. Its height after 2 s is

A) 20 m

B) 40 m

C) 60 m

D) 80 m

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17. A car moves at 30 m/s. Driver reaction time is 1 s. Braking distance is 45 m. The stopping distance is

A) 45 m

B) 60 m

C) 75 m

D) 90 m

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18. A ball is thrown downward from a height with 15 m/s. After 2 s, its speed is

A) 25 m/s

B) 30 m/s

C) 35 m/s

D) 40 m/s

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19. A ball is projected upward from a 30 m tower with 20 m/s. The maximum height above the ground is

A) 40 m

B) 50 m

C) 60 m

D) 70 m

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20. A freely falling body travels 1 m, 3 m, 5 m, 7 m... in successive seconds. This illustrates

A) Newton's First Law

B) Galileo's Law of Odd Numbers

C) Conservation of Energy

D) Law of Inertia

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Answer Key

Q	Ans	Q	Ans
1	B	11	C
2	B	12	C
3	A	13	B
4	C	14	C
5	C	15	C
6	C	16	C
7	B	17	C
8	C	18	C
9	C	19	B
10	C	20	B