If a paper and a book are dropped from same height at a time, they will reach the ground at same time
A) if their masses are equal
B) if there were no air resistance
C) if there is no gravitation
D) not possible
1 Answers
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On 30th June, 2014 the Pass Book of Sh. Mahabir Preshad showed a balanve of ₹22,000. On comparing the Pass Book with Cash Book the following differenc
Correct Answer - Dr. Balanc as per Cash Book ₹11,550.
2 Answers 1 views
On 31st December, 2014 the Cash Book of Gopal showed debit balance of 12,000. On comparing the Cash Book with the Pass Book, the following decrepancie
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Places A and B are 160 km apart on a highway. One car starts from A and another from B at the same time. If they travel in the same direction, they me
Correct Answer - 50 kmph, 30 kmph
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In order to understand the topic transport and circulatory system the instrument that is prepared with paper as paper tube
(A) Stethoscope
2 Answers 2 views
A body released from height ‘h’ takes time’t’ to reach the ground. After time t/2, its height from the ground is
C) \(\cfrac{3h}4\)
2 Answers 1 views
If a body is projected horizontally from the top of a tower the time taken by it to reach the ground depends upon
B) height of the tower
2 Answers 1 views
If the mean height of 3 boys is 142 cm. and the mean height of another 7 students is 145 cm., then the mean height of 10 students.
Correct option is (B) 144.1 cm The mean height of 10 boys \(=\frac{3\times142+7\times145}{10}\) \(=\frac{426+1015}{10}\) \(=\frac{1441}{10}\) = 144.1 cm
2 Answers 1 views
When a stone and a leaf were dropped from same height in your classroom, then the observation is
B) Because of air resistance stone will reach the ground first.
2 Answers 1 views
A stone is dropped by an astronaut from a height of 1.47 m above the surface of a planet. When stone reaches a point P at a height of 0.32 m it attain
Correct Answer - [No]
2 Answers 8 views
A projectile is thrown at angle `beta` with vertical.It reaches a maximum height `H`.The time taken to reach the hightest point of its path is
Correct Answer - B `t=sqrt((2H)/g)`
2 Answers 1 views