A body is projected vertically up. The distance covered in its last second of upward motion if g = 102 m/s is
A) 10 m
B) 2 m
C) 5 m
D) 0 m
1 Answers
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Why does a passenger feel lighter when the lift is about to stop at a higher floor during its upward motion?
1. When the lift is about to stop at a higher floor during its upward motion it has a net downward acceleration. 2. As the net acceleration is downwards, the downward...
2 Answers 3 views
A body projected vertically with a velocity ‘u’ from ground. Its velocity
C) at \(\cfrac{1}3^{rd}\) of maximum height is \(\sqrt{\cfrac{2}{3}}\) u
2 Answers 1 views
A body is projected vertically up from ground with a speed √(gh). The average speed of total motion is
B) \({\cfrac{\sqrt{gh}}{2}}\)
2 Answers 2 views
A body falling for 2 sec. covers a distance ‘s’ equals to that covered in next second. If g = 10 m/s^2 , s =
Correct option is A) 30 m
2 Answers 2 views
An AP 5, 8, 11…has 40 terms. Find the last term. Also find the sum of the last 10 terms.
First Term of the AP (a) = 5 Common difference (d) = 8 - 5 = 3 Last term = a40 = a + (40 - 1) d = 5 + 39 × 3...
2 Answers 1 views
For a vertically projected body, a = A) + g B) g^2
Correct option is C) – g
2 Answers 1 views
The time taken, by the body projected vertically up with a speed of 20 m/s to return back to the ground is (g = 10 m/s^2)
Correct option is A) 4 sec
2 Answers 1 views
A ball is thrown vertically upwards with a speed of `10 m//s` from the top of a tower 200 m height and another is thrown vertically downwards with the
Correct Answer - C `Deltat=(2u)/(g)`
2 Answers 1 views
A body is projected at angle `30^(@)` to horizontal with a velocity `50 ms^(-1)`.Its time of flight is
Correct Answer - B `T=(2u sin theta)/g`
2 Answers 1 views
A particle of mass m = 100 g is projected vertically up with a kinetic energy of 20 J form a position where its gravitational potential energy is – 50
Correct Answer - 20 m
2 Answers 2 views