h =(u)2/g
h = (u)2/4g
h = (2u)2/g
h = (u)2/2g
Correct answer is B
From V2 = U2 + 2as
O = U 2 - 2gH, since at maximum height H, the final velocity, v = O.
when K.E = P.E
∴ H = (U)2/2g
Halfway is the height / 2
PE = KE at (1)/2 H = (U)2 /2g x (1/2) = U2 / 4g
0.01 Hz
0.04 Hz
2.27 Hz
3.60 Hz
Correct answer is D
Frequency = (No. of revolutions)/ Time = (90)/25 = 3.6 Hz
I and II only
I and III only
II and III only
I, II and II only
Correct answer is D
The condition (ii) is a condition for an equilibrium of parallel forces only while conditions (i) and (iii) are correct for both parallel and non- parallel coplanar forces.
No specifications are made, so all conditions apply.
3.6 ms-1
3.77 ms-1
4.0 ms-1
7.5 ms-1
Correct answer is B
V = wr = 2πf r = 2 x (22)/7 x 1 x 0.6
= 3.77ms-1
Which of the following is NOT a vector quantity?
altitude
acceleration
displacement
weight
Correct answer is A
Altitude is just a measure of height, regardless of direction.