Tags Physics Laws of Motion

Physics Laws of Motion

Get insights from 189 questions on Physics Laws of Motion, answered by students, alumni, and experts. You may also ask and answer any question you like about Physics Laws of Motion

Follow Ask Question

189

Questions

Discussions

Active Users

Followers

New answer posted

3 months ago

Physics Laws of Motion Class 11th

How many types of forces are there in Class 11 Physics?

0 Follower 1 View

Syed Aquib Ur Rahman

Contributor-Level 10

In Class 11 Physics, we typically talk about two main categories of forces. One is contact forces, and the second is non-contact forces. Contact forces are friction, tension, normal force, and spring force. On the other hand, non-contact forces consist of gravitational, electrostatic, and magnetic forces. These types of forces help us in understanding Newton's laws of motion, free-body diagrams (FBDs), and the concept of equilibrium.

0 0

New answer posted

3 months ago

Physics Laws of Motion Class 11th

A balloon has mass of 10g in air. The air escapes from the balloon at a uniform rate with velocity 4.5 cm/s. If the balloon shrinks in 5s completely. Then, the average force acting on the balloon will be (in dyne).

0 Follower 4 Views

Vishal Baghel

Contributor-Level 10

$F t = m Δ v$

$? F ? = \frac{m Δ v}{t} = \frac{10 * 1 0^{- 3} * 4.5}{100 * 5}$ 9 * 10^-4 N.

= 9 * 10^-5 N

= 9 dyne.

0 0

New question posted

3 months ago

Physics Laws of Motion Class 11th

In two different experiments, an object of mass 5kg moving with a speed of 25 ms^-¹ hits two different walls and comes to rest within (i) 3 second, (ii) 5 seconds, respectively.

Choose the correct option out of the following:

0 Follower 1 View

New question posted

3 months ago

Physics Laws of Motion Class 11th

In two different experiments, an object of mass 5kg moving with a speed of 25 ms^-¹ hits two different walls and comes to rest within (i) 3 second, (ii) 5 seconds, respectively.

Choose the correct option out of the following:

0 Follower 3 Views

New answer posted

3 months ago

Physics Laws of Motion Class 11th

Consider a uniform cubical box of side a on a rough floor that is to be moved by applying minimum possible force $F$ at $a$ point $b$ above its centre of mass (see figure). If the coefficient of friction is $μ = 0.4$ , the maximum possible value of $100 * \frac{b}{a}$ for box not to topple before moving is

0 Follower 6 Views

alok kumar singh

Contributor-Level 10

For no toppling

$F (\frac{a}{2} + b) \leq m g \frac{a}{2}$

$μ \frac{a}{2} + μ b \leq \frac{a}{2}$

$0.2 a + 0.4 b \leq 0.5 a$

$0.4 b \leq 0.3 a$

$b \leq \frac{3 a}{4}$

$b \leq 0.75 a$ (in limiting case)

But is not possible as maximum value of $b$ can be equal to $0.5 a$ only.

$∴ {(100 \frac{b}{a})}_{m a x} = 50.00$

0 0

New answer posted

3 months ago

Physics Laws of Motion Class 11th

Four forces are acting at a point P in equilibrium as shown in figure. The ratio of force F₁ to F₂ is 1: x where x = _________.

0 Follower 3 Views

Vishal Baghel

Contributor-Level 10

$F_{2} = 1 c o s 45 ° + 2 c o s 45 ° = 3 c o s 45 ° = \frac{3}{\sqrt[]{2}} N$

$\begin{array}{l} F_{1} + 1 c o s 45 ° = 2 s i n 45 ° \\ \frac{F_{1}}{F_{2}} = 1 : 3 \end{array}$

x = 3

0 0

New answer posted

3 months ago

Physics Laws of Motion Class 11th

A car is moving with speed of 150 km/h and after applying the break it will move 27m before it stops. If the same car is moving with a speed of one third the reported speed then it will stop after travelling _________m distance.

0 Follower 11 Views

Vishal Baghel

Contributor-Level 10

Stopping distance = $\frac{v^{2}}{2 a} = d$ $\frac{^{}}{}$

If speed is made $\frac{1}{3} r d$ $\frac{}{}$

$d^{1} = \frac{d}{9}, d^{1} = \frac{27}{9} = 3 m$

Braking acceleration Remains same.

0 0

New answer posted

3 months ago

Physics Laws of Motion Class 11th

A uniform chain of 6m length is placed on a table such that a part of its length is hanging over the edge of the table. The system is at rest. The co-efficient of static friction between the chain and the surface of the table is 0.5, the maximum length of the chain hanging from the table is………….m.

0 Follower 2 Views

Payal Gupta

Contributor-Level 10

F.B.D. of hanging length

F.B.D. of chain lying on the table

f = T = $μ N$

$\Rightarrow λ x g = μ λ (L - x) g$

$x = 0.5 (6 - x)$

$\Rightarrow x = 3 - 0.5 x$

$1.5 x = 3$

x = 2m

0 0

New answer posted

4 months ago

Physics Laws of Motion Laws of Motion

A ball of mass 100 g is dropped from a height h = 10 cm on a platform fixed at the top of a vertical spring (as shown in figure). The ball stays on the platform and the platform is depressed by a distance $\frac{h}{2} .$ the spring constant is _________ Nm^-1. (Use g = 10 ms^-2)

0 Follower 7 Views

Vishal Baghel

Contributor-Level 10

COME

$k \cdot E_{i} + P \cdot E_{i} = k \cdot E_{f} + P \cdot E_{f}$

$\Rightarrow 0 + m g (h + \frac{h}{2}) = 0 + \frac{1}{2} k {(\frac{h}{2})}^{2}$ $\Rightarrow \frac{3 h}{2} m g = \frac{1}{2} k \frac{h^{2}}{4}$

$\Rightarrow 3 m g h = \frac{k}{4} h^{2} \Rightarrow 12 \frac{m g}{h} = k \Rightarrow k = \frac{12 * 0.1 * 10}{0.1}$

k = 120Nm^-1

0 0

New answer posted

4 months ago

Physics Laws of Motion Class 11th

A stone of mass m, tied to a string is being whirled in a vertical circle with a uniform speed. The tension in the string is

0 Follower 3 Views

Payal Gupta

Contributor-Level 10

Is minimum at the highest position of the circular path.

0 0

Get authentic answers from experts, students and alumni that you won't find anywhere else

On Shiksha, get access to

65k Colleges
1.2k Exams
679k Reviews
1800k Answers

Community GuidelinesUser Points System

QuestionsDiscussionsTags

Need guidance on career and education? Ask our experts

Your Question

Physics Laws of Motion

Questions

Discussions

Active Users

Followers

All

Discussions

Unanswered Questions

Share Your College Life Experience