Class 11 | Physics Vector | Under what condition |vecA+vecB|=|vecA-vecB| hold good

 

Answer: If angle between A and B is 90 degree.

Class 11 Vector, Unit Dimension and Error Written test FM 25

 

The density of a solid ball is to be determined in an experiment. The diameter of the ball is measured with a screw gauge, whose pitch is 0.5mm and there are 50 divisions on the circular scale. The reading on the main scale is 2.5mm and that on the circular scale is 20 divisions. If the measured mass of the ball has a relative error of 2%, the relative percentage error in the density is

The energy of a system as a function of time t is given as E(t) =A^2 exp(-at), where a=0.2 s^-1. The measurement of A has an error of 1.25%. If the error in the measurement of time is 1.50%, the percentage error in the value of E(t) at t=5 sec is

A particle moving with uniform speed v, change its direction by angle theta in time t. Magnitude of its average acceleration during this time is

 

Two bodies were thrown simultaneously from the same point, one straight up, and the other, at an angle of 30degree to the horizontal. The initial speed of each body is 20 m/s . Neglecting air resistance, the distance between the bodies at t=1.2 later Class 11 Vector Relative motion

 

When the velocity makes an angle 30° with the horizontal, the kinetic energy of the body will be K/2 K/3 2K/3 3K/4 Class 11 Vector Projectile Motion

 

Two plane 2x+3y-z=5 and 3x-ky+3z=6 are perpendicular to each other find k

 

Two plane 2x+3y-z=5 and 3x-ky+3z=6 are perpendicular to each other find k Vector Algebra Class 12

 

For what value of 'a' the vector 2i-3j+4k and ai+6j-8k are collinear

 

For More Vector Question click here 

Class 11 Vector test MCQ FM 30

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ANS Mathematics & Physics

Projection of vector a on b vector with example

Projection of the vector 2i+3j+2k on the vector i-2j+3k?

Ans- 2/sqrt14

for full information watch above video carefully.

Two vector makes an angle 120 degree with each other. If one of them is reversed then resultant become root3 times of the previous resultant. Find the ratio of the magnitude of the vectors