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How to read log & anti log table??????

what is triangle law of vector addition

what is polar vector and axial vector?

A projectile is fired horizontally with a velocity u.Show that its trajectory is a parabola.

the speed of a projectile when it is at its greatest height is root(2/5) times its speed at half the max height . what is the angle of projection ?

its urgent please tell quick

Define centripetal acceleration. Derive an expression for the centripetal acceleration of a particle moving with uniform speed v along a circular path of radius r.discuss the direction of this accelerationDerive relation between linear velocity and angular velocity

The angle between vector A and vector B is 60.What is the ratio of vector A.vector B (DOT PRODUCT) and vector A*B?

PLZ REPLY SOONER

How collinear vectors can be parallel?how to use a log book to find natural sines and natural cos ?

The 200 N force is to be resolved into components along the lines a-a' and b-b'.

(a) Determine the angle P by trigonometry knowing that the component along a-a' is 150 N.

(b) What is the corresponding value of the component along b-b'?

answer: (a) 103.0 degrees (b) 276 N

Please help me with the solution.

The relation between time(t) and distance(x) is t=Ax^2 + Bx, A and B are constants. Prove that its retardation is 2Av^3.

A person moves 30m north then 20m east and finally 30 root 2 m south west .find the displacement from original position

The resultant of two vectors A and B is perpendicular to vector A and its magnitude is equal to half the magnitude of vector B ,Find the angle between A and B?

A particle is moving along a circular path of radius 5m with a uniform speed of 5m/s. What will be the average acceleration when the particle completes the half revolution? (Ans : 10/pi m/s)

A particle is projected vertically upwards from point A on the ground. It takes t1 time to reach a point B but it still continues to move up. If it takes further t2 time to reach the ground from point B then height of point B from the ground is :A) 1/2*g*(t_{1}+t_{2})^{2}B) gt_{1}t_{2}C) 1/2*g*(t

_{1}+ t_{2})^{2}D) 1/2*g*t_{1}t_{2}Xplain the solution.........define positive,negative and zero work with examples

The range of the rifle bullet is 1000m, when theta is the angle of projection. If the bullet is fired with same angle from a car moving with 36km/hr towards the target, show that the range will be increased by 1000/7(tanθ)

^{1/2.}satae and explain polygon law of vectors

A particle starts rotating from rest and displaces according to the formula:θ= 3t

^{3}/20 - t^{2}/3. Calculate the angular velocity and angular acceleration at the end of 5 seconds.Can you prove that path of a projectile is a parabola....???

Prove the following

(a) For two angles of projection θ and (90-θ) with same velocity v, (i) range is same (ii) heights are in the ratio tan

^{2}θ : 1(b)If the range and maximum height are equal, then the angle of projection is tan

^{-1}(4)2. Two vectors, both equal in magnitude, have their resultant equal in magnitude of the either. Find the angle between the two vectors.

OR

Two equal forces have their resultant equal to either, what is the inclination between them?

A cricketer can throw a ball to a maximum horizontal distance of 100m. How much high above the ground can the crickter throw the same ball?

a projectile is thrown horizontally from top of a tower strikes the ground after 3sec at an angle 45

^{0}with horizontal.find height of tower and speed which body was projected.{g=9.8m/s^{2}}Two forces acting on a particle in opposite directions have the resultant of 10N. If they act at right angles to each other, the resultant it 50N. Fing the 2 forces.

a motor boat is racing towards north at 25km/h & the water current in tht region is 10 km/h in d direction of 60 degree east of south . find d resultant velocity of boat ............

my question is how do we know frm where we have to take angle ......... plzzz xplain me ... i hv xam tomorrow.......

what do your mean by the resolution of vector?show that there is only one way in which a vector can be resolved into two component vectors along the direction of two given vectors

the ceiling of a long hall is 25 m high . what is the maximum horizontal distance that a ball thrown with a speed of 40 m/s can go without hitting the ceiling of the hall ?

A car with weight W is on ramp which makes an angle with the horizontal. how large a perpendicular force must the ramp withstand if it is not to break under its own weight?

A man can swim in still water at a speed of 3km/h . He wants to cross a river that flows at a speed of 2 km/h and reach a point directly opposite to the starting point.

1. In what direction should he try to swim ?

2. How much time will he take to cross the river if the river is 500 m wide ?

flying horizontally.

a) Sketch the path of the falling food packet.

b) If the time taken by the packet to reach the earth’s surface is ‘6’ seconds, calculate the height from which the packet is dropped. (Take g = 10m/s2)

Rain is falling vertically with a speed of 35m/s . winds starts blowing after sometime with a speed of 12m/s in east to west direction . In which direction . In which direction should a boy waiting at a bus stop hold his umbrella ? this question was answered wrong by an expert i need d correct answer and explanaton for this :(

what is meant by resolving a force into rectangular components? resolve a force of 10 N into 2 components, if it acts at an angle 30 degree with the horizontal.?

One second after projection a stone moves at an angle of 45 degree with the horizontal. Two seconds after projection it moves horizontally .Then what is the angle of projection of the projectile?

find the magnitude and direction of the resultant of two vectors A and B in terms of their magnitudes and angle

Obetween them..show that path of a projectile is a parabola.

a projectile is fired horizontal with a speed 98m/s from the top of hill 490m height. find

Obtain the component of vector

A=2i+3jin the direction of vectori+j.discuss the condition for the maximum range of the projectile.Show that for a given velocity of projection, there are two angles of projection which give the same range of projectile ?

A projectile is projected with velocity u making an angle q in the horizontal direction. Derive an expression for (a) time of flight (b) horizontal range.

Prove that the vectors A=6i+9j-12k and B=2i+3j-4k are parallel.

A hiker stands on the edge of a cliff 490 m above the ground and throws a stone horizontally with an initial velocity of 15 m/s.Neglecting air resistence,find the time taken by the stone to reach the ground and the speed with which it hits the ground.(g=9.8 m/s).Please provide the answer for this question.

r=3t i +2t^{2}J +5k , where t is in second and the coefficients have the proper units forrto be in metre. Find the magnitude and direction of the velocity of the particle at t=3s.Prove that the maximum horizontal range is 4 times the max height attained by the projectile fired at an inclination so as to have maximum horizontal range

Q. A child pulls a rope attached to a stone with a force of 60N. the rope makes an angle of 40 degree to the ground.

a) calculate the effective value of the pull tending to move the stone along the ground.

b) Calculate the force tending to lift the stone vertically.

( plss help me in this question with a diagram)

the equation of projectile is y = ax - bx2 . its horizontal range is?

A projectile is thrown into space so as tohave a max. possible horizontal range of 400mts. Taking the point of projection as the origin, the co-ordinates of the point where the velocity of the projectile is minimum are? can you show how to solve it?

An object is projected with velocity v

_{0}=15i^ +20j^. Considering x along horizontal axis and y along vertical axis. Find its velocity after 2 seonds.If A=3i+4j and B=7i+24j then find the vector having the same magnitude as B and same direction as A.

in a circle. He finds that it travels 6 revolutions

in an anticlockwise direction for a time of

31.4sec.

a) Find the angular velocity of the

insect.

b) If the insect travels

4 revolutions in the clockwise

direction for a time of 8.6sec, what

will be the angular speed averaged

over the total time?

c) Obtain the expression for centripetal

acceleration (ac) in terms of angular

speed ( ).

a body thrown vertically up with initial velocity 52 m/sec from the ground passes twice a point at H height above at an interval of 10 s . The height H is (Take g= 10)

A body of mass 10 kg revolves in a circle of diameter 0.4 m making 1000 revolutions per minute. Calculate linear velocity and centripetal acceleration.

Two particles A and B start moving with velocities 20m/s and 30√2m/s along x-axis and at an angle of 45 degree with x-axis respectively in xy - plane from origin. what is the relative velocity of B w.r.t A ?

two paper screens A and B Are seperated by a distance of 100m. A gullet penetrates A and B at points P AND Q respectively. Where Q is 10 cm below P. If bullet is travelling horizontally at the time of hitting A the velocity of bullet ar A is nearly how much?Help experts

A river 1 km wide is flowing at 3 km/h . A swimmer whose velocity in still water is 4 km/h can swim only for 15 minutes.In what direction should he strike out in order reach the other bank ? What is the total distance covered ?

a PARTICLE IS PROJECTED FROM GROUND WITH SPEED 80 m/s AT AN ANGLE 30 DEGREE WITH HORIZONTAL FROM GROUND .THE MAG NITUDE OF AVERAGE VELOCITY OF PARTICLE IN TIME T=2SEC TO T=6SECS IS?

Forces 3P,7P and 5P act at a point paralell to the sides AB,BC and AC of the equilateral triangleABC.Find the magnitude and direction of the resultant.

A particle starts from origin t=0 with a velocity 5.0 ^i m/s and moves in x-y plane under action of a force which produces a constant acceleration of (3.0 ^i + 2.0^j) m/s squ.

a) What is the y coordinate of the particle at the instant its x coordinate is 84m?

b)What is the speed of the particle at this time?

Please help! :o

A projectile is fired with a horizontal velocity 330m/s from the top of a cliff 80m. How long will it take to strike the ground at the base of the cliff?

If vector A and B are two non collinear unit vectors and if |A+B|=, then find the value of (A-B).(2A+B)

Please help! :O

What is the difference between resultant of vectors and resolution of vectors? Yes, I understand that one means the sum or difference of two vectors while the other refers to the the component of vectors. But how.. i am confused. Their formula's are used to find the same thing! or not.

Sorry.

A PROJECTILE IS PROJECTED WITH A VELOCITY u SO THAT ITS HORIZONTAL RANGE IS TWICE THE GREATEST HEIGHT ATTAINED.FIND THE HORIZONTAL RANGE OF IT

a river is flowing from west to east at speed 5m/min. a man on the south bank of river, capable of swimming at 10m/ min in still water wants to swim across the river to a point directly opposite in shortest time. what direction shoukd he swim in?

can u plz explain the meaning of this problem with the help of a diagram. n wt is rele to be found out.?i need this soon plz.

is electric current a scalar or a vector quantity?give reasons.

in a car race, car A takes a tym t sec less than the car B and passes the finishing part with a velocity v more than that of the car B .if the cars start from rest and travel with constant accleration A1 and A2 respectively. show that V = T * root over of A1* A2.

THE DIAGONALS OF A PARALLELOGRAM ARE REPRESENTED BY VECTORS P=5i-4j+3k and q=3i+2j-k.

THE AREA OF THE PARALLELOGRAM IS?

write the dimensions of a/b in the relation F=a root x +bt

^{2}where F is force , x is distance and t is time.A particle is subjected to two equal forces along two different directions. If one of them is halved, the angle which the resultant makes with the other is also halved, The angle between the forces is halved. The angle between the forces is ?