A car accelerates from rest at α then decelerates at β to rest. If total time is t, find total distance.
Anonymous Quiz
25%
αβt²/(2(α+β))
49%
(α+β)t²/2αβ
20%
αβt²/(α+β)
5%
(α+β)t²/αβ
A spring of force constant k is cut into lengths l1:l2=2:3. The force constant of the longer piece is?
Anonymous Quiz
13%
5k/2
52%
5k/3
32%
2k/5
3%
3k/5
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A body is projected vertically up. At max height, its:
Anonymous Quiz
15%
Velocity is max
52%
Acceleration is zero
28%
Velocity is zero
5%
Acceleration is max
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A particle's position is r = t i + t² j. Angle between velocity & acceleration at t=1s?
Anonymous Quiz
12%
0°
47%
45°
32%
60°
10%
90°
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A ball of mass 'm' strikes a wall with speed 'v' at angle 30° and rebounds at same speed & angle. Impulse is:
Anonymous Quiz
10%
mv
37%
2mv
41%
mv/2
12%
mv/sqrt(2)
If f(x)+f(1/x)=x+1/x, then ∫₀¹ f(x) dx = ?
Anonymous Quiz
15%
0
56%
1
27%
1/2
3%
Cannot be determined.
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A ball's KE increases 300%. Momentum increases by:
Anonymous Quiz
46%
100%
32%
173%
15%
400%
7%
200%
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