Q251
Errorless
14. Critical Thinking-friction
MCQ
As shown in the figure a block of mass 10kg lying on a horizontal surface is pulled by a force F acting at an angle $30^{\circ}$ , with horizontal. For $\mu_{s}=0.25$ , the block will just start to move for the value of F
[Given $g=10ms^{-2}$ ]
A.
33.3 N
B.
25.2 N
C.
20 N
D.
35.7 N
Q252
Errorless
16. Reasoning Type Questions-friction
MCQ
Statement-1 : While drawing a line on a paper by pencil, friction force acts on paper in the same direction along which line is drawn on the paper.
Statement-2 : Friction always opposes motion.
A.
If both assertion and reason are true and the reason is the correct explanation of the assertion.
B.
If both assertion and reason are true but reason is not the correct explanation of the assertion.
C.
If assertion is true but reason is false.
D.
If the assertion and reason both are false.
E.
If assertion is false but reason is true.
Q253
Errorless
17. Comprehension Type Questions-friction
MSQ
The speed is maximum after the mass covers a distance of
A.
$\frac{\cos\theta}{\mu_{0}}$
B.
$\frac{\sin\theta}{\mu_{0}}$
C.
$\frac{\tan\theta}{\mu_{0}}$
D.
$\frac{2\tan\theta}{\mu_{0}}$
Q254
Errorless
17. Comprehension Type Questions-friction
MCQ
Distance of the mass from its initial point where it will come to rest
A.
$\frac{\sin\theta}{\mu_{0}}$
B.
$\frac{2\tan\theta}{\mu_{0}}$
C.
$\frac{\tan\theta}{\mu_{0}}$
D.
$\frac{2\sin\theta}{\mu_{0}}$
Q255
Errorless
17. Comprehension Type Questions-friction
MCQ
What is the maximum speed of the mass
A.
$\sqrt{\frac{g\sin\theta\cos\theta}{\mu_0}}$
B.
$\sqrt{\frac{g\sin\theta\tan\theta}{\mu_0}}$
C.
$\sqrt{\frac{g\sin^2\theta\cos\theta}{\mu_0}}$
D.
$\sqrt{\frac{g\sin\theta\cos^2\theta}{\mu_0}}$