1
KCET 2022
MCQ (Single Correct Answer)
+1
-0

A car is moving in a circular horizontal track of radius $$10 \mathrm{~m}$$ with a constant speed of $$10 \mathrm{~ms}^{-1}$$. A bob is suspended from the roof of the car by a light wire of length $$1.0 \mathrm{~m}$$. The angle made by the wire with the vertical is (in rad)

A
$$\frac{\pi}{4}$$
B
zero
C
$$\frac{\pi}{3}$$
D
$$\frac{\pi}{6}$$
2
KCET 2021
MCQ (Single Correct Answer)
+1
-0

A coin placed on a rotating turn table just slips if it is placed at a distance of $$4 \mathrm{~cm}$$ from the centre. If the angular velocity of the turn table is doubled it will just slip at a distance of

A
1 cm
B
2 cm
C
4 cm
D
8 cm
3
KCET 2020
MCQ (Single Correct Answer)
+1
-0

One end of a string of length $$l$$ is connected to a particle of mass $$m$$ and the other to a small peg on a smooth horizontal table. If the particle moves in a circle with speed $$v$$, the net force on the particle (directed towards the centre) is ($$T$$ is the tension in the string)

A
$$T$$
B
$$T-\frac{m v^2}{l}$$
C
$$T+\frac{m v^2}{l}$$
D
zero
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