CBSE > Class 11 > Physics | CBSE Board | Homework Help

It depends on whether a and b are scalar or vector qantities if a vector quantities then their value depend on the angle between them . They are equal at an angle of 90 degree.

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A ball is throw vertically upwards with velocity of 20m/s from the top of a multistorey building .the height of point from where the ball is thrown is 25m from the ground.how distance become negative

Posted by Eliza Mary 4 years, 2 months ago

CBSE > Class 11 > Physics

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the moon subtends an angle of 1 Degree 55 minutes and the baseline equal to diameter of the earth. what will be the distance of the moon from earth. radius of the earth is 6.4 into 10 ^ 6 metre

Posted by Mehar Ansari 4 years, 2 months ago

CBSE > Class 11 > Physics

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Sia ? 4 years, 2 months ago

According to the problem the the moon has created an angle of θ= 1 degree 55min

Now we need to convert it into radian

therefore,

115/60 degree = 23/12 x π/180 rad

Let r be the radius of the earth

therefore, r = 6.4 × 10⁶m

From I = rθ,

r = 1/θ

= 6.4 × 10⁶x 12 × 180/23 × π m = 1.91 × 10⁸m

Hence the answer is 1.91 × 10⁸m

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The distance travelled by a particle in time T is given by x is equal to 2.5 metre per second square t square find the average speed of the particle during the time 025 second and the instantaneous velocity speed 80

Posted by Anup Singh 4 years, 2 months ago

CBSE > Class 11 > Physics

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A Dash is equal to two 2 I cap + J cap + K cap and B dash is equal to I CAP + J cap + K cap are two vector ,then unit vector perpendicular to A dash is

Posted by Aditi Sayagaon 4 years, 2 months ago

CBSE > Class 11 > Physics

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Posted by Rohit Paul 4 years, 2 months ago

CBSE > Class 11 > Physics

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Sia ? 4 years, 2 months ago

Please ask question with complete information.

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The mass of a ball is found 2+- p. 5 kg and it is mass with velocity 10+- 0.2 m/s find percentage error in measurement of momentum

Posted by Shalu Singh 4 years, 2 months ago

CBSE > Class 11 > Physics

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Anjan Karthi 4 years, 2 months ago

P% = ∆m/m × 100 + ∆v/v × 100 = 0.5 / 2 × 100 + 0. 2 /10 × 100 = 25 + 2 = 27%//

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The force F acting on the body depends upon i) mass of the body and ii) acceleration (a) of the body. Find the expression for the force F using the method of dimensions

Posted by Judith Judith 4 years, 2 months ago

CBSE > Class 11 > Physics

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Anjan Karthi 4 years, 2 months ago

F proportional to m^A a^B. F = k (m^A a^B). [MLT^-2] = [M^A] [LT^-2]^B. Therefore, On equating, we get A = B = 1. Therefore, F = m^1 a^1. OR, F = ma.

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What is persec?

Posted by Sikha Oram 4 years, 2 months ago

CBSE > Class 11 > Physics

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Anjan Karthi 4 years, 2 months ago

1 parsec = 3.26 light years. Largest practical unit of distance. Abbreviation of parallactic second. The distance at which 1.496 × 10^11 m makes an angle of 1".

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Harmanpreet Kaur 4 years, 2 months ago

The distance at which 1A.U. make an angle of 1"

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(1) 1 light year = _______cm (2) 1 AU = _________ (3) 1 persec = ______unit (4) 1 amstron =______cm (5) 1 amstron = _______m (6) 1 Fermi = ________cm

Posted by Sikha Oram 4 years, 2 months ago

CBSE > Class 11 > Physics

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Anjan Karthi 4 years, 2 months ago

Lat one above is (4).

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Anjan Karthi 4 years, 2 months ago

(1) 1 light year = 9.5 × 10^15 m = 9.5 × 10^15 × 10^2 = 9.5 × 10^17 cm // (2) 1 A. U. = 1.496 × 10^11 m // (3) 1 Å = 10^-10 m = 10^-10 × 10^2 = 10^-8 cm.

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Mesurment of time 6 point

Posted by Deepak Yadav 4 years, 2 months ago

CBSE > Class 11 > Physics

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A elevator weight is 4000kg when the upward tension in the supporting cable is 48000N what is upward acceleration starting from the rest how far does it rides in 3 sec.

Posted by Jai Jangid 4 years, 2 months ago

CBSE > Class 11 > Physics

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Sia ? 4 years, 2 months ago

F = ma

upward acceleration is 'a'

F is tension

m is elevetor weight

a = F/m

a = 48000 / 4000

a = 12m/s²

v²− u²= 2as

S is height

v = u tat

v = at, u = 4

v = 36m/s

v²= 2as

S = 18m

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Position of a particle changes with time as x = 5t2 - 2t +1 where x is position in m and t is time in sec. Find the average speed of a particle between t=1s to t=4s.

Posted by Sneh Patel 4 years, 2 months ago

CBSE > Class 11 > Physics

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Using a screw gauge the diameter of a metal rod was measured

Posted by Ann Martin 4 years, 2 months ago

CBSE > Class 11 > Physics

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How to do integration basicsss

Posted by Aj Karaiya 4 years, 2 months ago

CBSE > Class 11 > Physics

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what is the time limit for (i)accuracy (ii) error

Posted by Akhil Ak 4 years, 2 months ago

CBSE > Class 11 > Physics

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Expand using binomial (1+3x)⁵ upto the …

Posted by Bhavya Khandelwal 4 years, 2 months ago

CBSE > Class 11 > Physics

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A ball rolls down an inclined track 2m long in 4s find (a) acceleration (b) time taken to cover the second metre of the track (c) speed of the ball at the bottom of the track

Posted by Harshit Karn 4 years, 2 months ago

CBSE > Class 11 > Physics

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Judith Judith 4 years, 2 months ago

I don't know

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What is the ratio of the time taken to go up and come down by a body thrown vertically up ??

Posted by Tanishka Aggarwal 4 years, 2 months ago

CBSE > Class 11 > Physics

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Mansi Sakle 4 years, 2 months ago

1. The upward and downward motion are accelerated and retarded by g. hence v-u/g=t where v is zero for upward motion whereas u is zero for downward motion.

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Exercise ka chapter1 ka q no. 1

Posted by Lado Sonkar 4 years, 2 months ago

CBSE > Class 11 > Physics