SuperCoaching AE/JE by Testbook
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A disc rolls w/o slipping. Ratio of translational KE to total KE is:
Anonymous Quiz
16%
1
52%
1/2
25%
2/3
7%
1/3
1
A ball of mass 'm' moving with velocity 'v' undergoes head-on elastic collision with another identical ball at rest. What is the velocity of the first ball after impact?
Anonymous Quiz
13%
v
46%
2v
17%
0
24%
v/2
A particle's position: x=t³-6t²+9t. Acceleration is zero at:
Anonymous Quiz
12%
t=1
41%
t=2
21%
t=3
26%
t=0
😁1
The area enclosed by |x|+|y|≤1 is?
Anonymous Quiz
43%
1
40%
2
15%
3
2%
4
2
Which reacts fastest with CH3I?
Anonymous Quiz
36%
(CH3)3CO-
41%
(CH3)3N
15%
(CH3)3P
8%
(CH3)3S+
1
If f(x) + f(1/x) = x, then f(x) = ?
Anonymous Quiz
23%
x/(x+1)
47%
(x^2-1)/2x
21%
(x^2+1)/2x
9%
x/2