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Ask QuestionPosted by Vanshika Xxxx 5 years, 2 months ago
- 2 answers
Yogita Ingle 5 years, 2 months ago
Case I:
let initial velocity = u m/s
distance=s=12m
Time =t=2sec
S=u+a(2t-1)/2
12=u+(2x2-1)/2
12=u+3a/2
2u+3a=24--------------(1)
Case II:
Time=t=4sec
distance =s=20m
20=u+a(2x4-1)/2
20=u+7a/2
2u+7a=40--------(2)
from 1 and 2:
2u+3a=24
2u+7a=40
- - -
***********
-4a=-16
a=4m/s2
substitute the value of a in equation 1 we get :
u=6m/s
Case iii:
Now, distance covered in 4sec after 5second=distance covered in 9th sec-distance covered in 5 sec
=(6x9+1/24x9x9)-(6x5+1/2*4*5*5)
=54+162-(30+50)
=136m
Posted by Komalpreet Kaur 5 years, 2 months ago
- 1 answers
Yogita Ingle 5 years, 2 months ago
Instantaneous velocity can be equal to average velocity when the acceleration is zero or velocity is constant because in this condition all the instantaneous velocities will be equal to each other and also equal to the average velocity. Or distance -time graph will be a straight line whose slope (velocity) is same at every point .
Posted by Navtej Singh 5 years, 2 months ago
- 2 answers
Hemant Kumar Bahrod 5 years, 2 months ago
Gaurav Seth 5 years, 2 months ago
Every object in the universe attracts every other object with a force which is called the force of gravitation.
Gravitation is one of the four classes of interactions found in nature.
These are
(i) the gravitational force
(ii) the electromagnetic force
(iii) the strong nuclear force (also called the hadronic force).
(iv) the weak nuclear forces.
Although, of negligible importance in the interactions of elementary particles, gravity is of primary importance in the interactions of objects. It is gravity that holds the universe together.
Posted by Avni Sharma 5 years, 2 months ago
- 1 answers
Ã.P.W.B.Đ ⚡ 5 years, 2 months ago
Posted by Adi Bhau . 5 years, 2 months ago
- 3 answers
Ã.P.W.B.Đ ⚡ 5 years, 2 months ago
Posted by Nehal Yadav 5 years, 2 months ago
- 1 answers
Gaurav Seth 5 years, 2 months ago
Let Time period =T
Mass of the bob = m
Acceleration due to gravity = g
Length of string = L
Let
⇒a=0 ⇒ Time period of oscillation is independent of mass of the bob
-2b=1
⇒b=-
b+c = 0
- + c =0
c=
Giving values to a,b and c in first equation
The real expression for Time period is
Posted by Prince Arora 5 years, 2 months ago
- 1 answers
Gaurav Seth 5 years, 2 months ago
Given,
Hight of Hall( H) = 25 m
Let ball is thrown with speed 40m/s at an angle ∅ with horizontal .
We know,
H = u²sin²∅/2g
25= (40)² × sin²∅/2× 10
25 = 80 × sin²∅
Sin²∅ = 25/80
Sin∅ = 5/4√5
Cos∅ = √55/4√5
Now, horizontal range = u²sin2∅/g
= (40)²× 2sin∅×cos∅/g
= 160 × 2 × 5/4√5 × √55/4√5
= 20√55 m
Posted by Krishna Agrawal 5 years, 2 months ago
- 3 answers
Gaurav Seth 5 years, 2 months ago
Degrees to Radian Formula
To convert degree to radian, we can use the same formula as given in the above section.
Degree x π/180 = Radian
Let us see some examples:
Example: Convert 15 degrees to radians.
Solution: Using the formula,
15 x π/180 = π/12
Example: Convert 330 degrees to radians.
Solution: Using the formula,
330 x π/180 = 11π/6
<th>Angle in Degrees</th> <th>Angle in Radians</th>| 0° | 0 |
| 30° | π/6 = 0.524Rad |
| 45° | π/4 = 0.785Rad |
| 60° | π/3 = 1.047Rad |
| 90° | π/2 = 1.571Rad |
Posted by Rajesh Chandra 5 years, 2 months ago
- 2 answers
Posted by Junaid Khan 5 years, 2 months ago
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Posted by Naseem Cheruppa 5 years, 2 months ago
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Posted by Avdesh Kumar 5 years, 2 months ago
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Posted by Ashish ?? Negi 5 years, 2 months ago
- 3 answers
Kartik Kacholoa 5 years, 2 months ago
Posted by Ishanvi Chawla 5 years, 2 months ago
- 1 answers
Posted by A.A ?? 5 years, 2 months ago
- 1 answers
Posted by Anami Sharma 5 years, 2 months ago
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Akshi ? 5 years, 2 months ago
Posted by Vanshika Xxxx 5 years, 2 months ago
- 2 answers
Yogita Ingle 5 years, 2 months ago
The initial velocity travelled is 625m
The accleration is α=10m/s2
The time is t=5s
Apply the equation of motion
v=u+at
The velocity is v=0+10.5=50m/s.
The distance travelled in the first 5s is
s=ut+ 1/2 at2 = 0.5+ 1/2.10.52=125m
Thedistancetravelledinthefollowing10s is
s1=ut1=50.10=500m
Thetotaldistancetravelledisd= s+s1 = 125+500=625m
Posted by Vanshika Xxxx 5 years, 2 months ago
- 2 answers
Yogita Ingle 5 years, 2 months ago
Let x be the distance travelled in time t. Then,
x∝t2 (given)
x=kt2 (Here, k = constant of proportionality)
We know that velocity is given
v=dx/dt=2kt
and acceleration is given by
a=dv/dt=2k (constant)
Thus, the body has uniform accelerated motion.
Posted by Vanshika Xxxx 5 years, 2 months ago
- 3 answers
Ã.P.W.B.Đ ⚡ 5 years, 2 months ago
Posted by Sonami Barik 5 years, 2 months ago
- 3 answers
Yogita Ingle 5 years, 2 months ago
In the field of physics, the Candela (often denoted by the symbol ‘cd’) can be defined as the unit of luminous intensity – a measure of the wavelength weighted power emitted by a source of light. As per the International System of Units (often abbreviated to SI), the Candela is a base unit which can be defined by taking the fixed value (in numerical terms) of the luminous efficacy of the monochromatic radiation having a frequency of 540 * 1012 Hertz. Alternately, it can be described as the luminous power corresponding to one unit solid angle that is emitted by a point source of light (in a given direction). The SI base unit for luminous intensity has Latin roots – the word ‘candela’ translates to ‘candle’ in the Latin language. It can be noted that the luminous intensity associated with the light emitted by a common wax candle is roughly equal to one candela.
Posted by Sukriti Das 5 years, 2 months ago
- 2 answers
Gaurav Seth 5 years, 2 months ago
Let us suppose the first force to be 3x and the other force to be 5x.
Now resultant can be given by sqrt [a*a + b*b + 2abcos(angle between a and b)]
so in this case the resutant becomes = sqrt [9x*x + 25x*x + 15x*x] = 35 N it is given
hence, 7x = 35
hence x = 5
so the values of the forces are 15N and 25N
Posted by Lifes Crush 5 years, 2 months ago
- 4 answers
Harsh Kumar Verma 5 years, 2 months ago
Yogita Ingle 5 years, 2 months ago
We all know that for a given volume of a liquid, a sphere has the least surface area. Also, the more the surface area of an object, the more is its surface energy.
Now, to remain in stable equilibrium, a body always tries to minimize its surface energy. Therefore it tries to reduce its surface area and hence acquires a spherical shape.
All this phenomena is because of the presence of surface tension of a fluid.
Posted by Lifes Crush 5 years, 2 months ago
- 2 answers
Gaurav Seth 5 years, 2 months ago
➧ Area of the house on the slide
➾ 1.75 cm²
➧ Area of the image of the house formed on the screen
➾ 1.55 m²
➾ 1 m = 100 cm
➾ 10² cm
➧ Area of the image of the house formed on the screen
➾ 1.55 m² = 1.55 × (10² cm)²
➾ 1.55 × 10^4 cm²
➧ Arial magnification
➾ area of image / area of slide
➾ 1.55 × 10^4 cm² / 1.75 cm²
➾ 0.8857 × 10^4
➧ Linear magnifications
➾ √(Arial magnification )
➾ √(0.8857 × 10^4)
➾ 0.9411 × 10²
➾ 94.11
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