Question

a truck is stationary and has a bob suspended by a light string in a frame attached to the truck .The truck suddenly moves to the right with an acceleration of a .The pendulum will tilt
1)to the left and angle of inclination of the pendulum with the vertical is tan (g/a)
2)to the left and angle of inclination of the pendulum with the vertical is sin (g/a)
3)to the left and angle of inclination of the pendulum with the vertical is tan(a/g)
4)to the left and angle of inclination of the pendulum with the vertical is sin (a/g)

in this question how do we find the angle?​

Answer 1

Answer:

the correct answer is (2)

Explanation:

can anyone give the explanation pls

Answer 2

Answer:

Option 3 is right

Explanation:

Concept

• A pendulum is a weight suspended from a single point. It's positioned such that the device can freely swing back and forth. A pendulum's bob is treated as a point mass in a basic pendulum. In addition, the rope from which it hangs is quite light.
• These simple pendulums are pretty intriguing when viewed through the lens of physics. This is because they are an excellent example of basic harmonic motion, which is similar to that of rubber bands or springs.

Solution

Now, from an equilibrium of forces in Attach diagram (b),

we get $m a \cos \theta=m g \sin \theta$

$\Rightarrow \frac{\sin \theta}{\cos \theta}=\frac{m a}{m g}$

$\Rightarrow \tan \theta=\frac{a}{g} \Rightarrow \theta=\tan ^{-1}\left(\frac{a}{g}\right)$

#SPJ6