Download App

Laws of Motion — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysicsLaws of Motion1 Mark
Question
Determine the maximum acceleration of the train in which a box lying on its floor will remain stationary, given that the co-efficient of static friction between the box and the train’s floor is 0.15.
✓

Answer

Since the acceleration of the box is due to the static friction,
$
\begin{aligned}
\quad m a & =f_s \leq \mu_s N=\mu_s m g \\
\text { i.e. } \quad a & \leq \mu_s g \\
\therefore a_{\max } & =\mu_s g=0.15 \times 10 m s ^{-2} \\
& =1.5 m s ^{-2}
\end{aligned}
$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "1 Marks Question" from Laws of Motion→Laws of Motion — all question types→Physics STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

When water changes into ice what is the effect on its valume and temperature?
→
Can the kinetic energy of a system remains constant if there is change in the momentum?
→
A hunter takes aim right at the sitting monkey on tree. As soon as the hunter releases the bullet, the monkey falls veritcally down from the tree. Will the bullet hit the monkey? Does whether the monkey gets hit or not depends on the initial velocity of the bullet?
→
Read each statement below carefully and state, with reasons and examples, if it is true or false:

A scalar quantity is one that

Does not vary from one point to another in space.

→
For giving rotational motion to machines how should the shaft be?
→
For the harmonic travelling wave $\text{y}=2\cos2\pi(10\text{t}-0.0080\text{x}+3.5)$ where x and y are in cm and t is second. What is the phase difference between the oscillatory motion at two points separated by a distance of:

0.5m

→
The velocity of a particle is towards west at an instant. Its acceleration is not towards west, not towards east, not towards north and not towards south. Give an example of this type of motion.
→
For the harmonic travelling wave $\text{y}=2\cos2\pi(10\text{t}-0.0080\text{x}+3.5)$ where x and y are in cm and t is second. What is the phase difference between the oscillatory motion at two points separated by a distance of:

$\frac{3\lambda}{4}$(at a given instant of time)

→
Why does the speed of sound differ from a solid and a liquid medium of same length?
→
In a rotating body, $\text{a}=\alpha\text{r}$ and $\text{v}=\omega\text{r}.$ Thus $\frac{\text{a}}{\alpha}=\frac{\text{v}}{\omega}.$ Can a co you use the theorems of ratio and proportion studied in algebra so as to write
$\frac{\text{a}+\alpha}{\text{a}-\alpha}=\frac{\text{v}+\omega}{\text{v}-\omega}$
→