Call me

Have a Query? We will call you right away.

+91

E.g: 9876543210, 01112345678

We will give you a call shortly, Thank You

Office hours: 9:00 am to 9:00 pm IST (7 days a week)

What are you looking for?

Syllabus

Prove that newton's second law of motion is the real law

a) the time of take off

b) acceleration

c)thrust of the jet engine

d) impulse

e) momentum at take off

State and prove law of conservation of linear momentum

Friction is a necessary evil.Explain

(g = 10m/${s}^{2}$). Select the correct statements.

(A) Acceleration of block A, B and C are 1 m/${s}^{2}$, 3 m/${s}^{2}$and 5 m/${s}^{2}$ respectively

(B) Contact force between B & Ground is 350 N

(C) Tension in string 30N

(D) Contact force between 'B' and 'C' is 15 N

State and prove the conservation of angular momentum.

Q4. The value of | T

_{1}– T_{2}| , in the given diagram, isA particle of mass

mmoves with constant speedvon a circular path of radiusr. Find the magnitude of average force on it in half revolution.The correct ans is 2mg (explain)

A man weighing 50 kg climbs 10m.Calculate work done by gravity.

Two balls A and B are thrown simultaneously ,A vertically upwards with a speed of 20m/s from ground,and B vetically downwards from a height of 40 m with the same seed and along the same line of motion . At what points do the two balls collide ?

A cricket ball of mass 150g is moving with a velocity of 12m/s and is hit by a bat, so that the ball is turned back with a velocity of 20m/s. The force of the blow acts for 0.01s on the ball. Find the average force exerted by the bat on the ball.

7. The tension in the string AB is (pulley and string are massless) (1) 15 N (2) 10 N

(3) 20 N (4) 30 N

what are the limitations of dimensional analysis?

A person of mass M kg is standing on a flits. If the lift moves vertically upwards according to given v-t graph then find out the weight of man at the following instants : (g-10 m/s

^{2})(i) t = 1 second

(ii) t = 8 second

(iii) t = 12 second

Find the acceleration of the system and the contact force between

(i) 2kg and 3 kg blocks (ii) 3kg and 5 kg blocks.

A machine gun has a mass of 20kg. It fires 30g bullets at the rate of 400 bullets per second with a speed of 400 m/s. What force must be applied to the gun to keep it in position ?

if the stretch in a spring of force constant k is doubled:calculate

a)ratio of final to initial force in the spring

b)ratio of elastic energies in 2 cases

c)work done in changing the double stretch

28. If pulleys shown in the diagram are smooth and massless and a

_{ 1}and a2 are acceleration of blocks of mass 4 kg and 8 kg respectively, then(a) a

_{1}= a_{2}(b) a

_{1}= 2a_{2}(c) 2a

_{1}= a_{2}(d) a

_{1}= 4a_{2}in formula F=DP/DT, d stands for what?

show that for two complementary angles of projection of a projectile thrown with thw same velocity. the horizontal ranges are equal

prove Lami's theorem.

207. A man holds a book weighing 10 N between hands and keep it free from falling by pressing both hands against the book with a force of 25 N each . The coefficient of friction between the book and hand would be

(A) 0.1 (B) 0.2

(C) 0.4 (D) 0.6

a block A of mass4 kg is placed on another block B of mass 5kg B rests on smooth table for sliding block A onB a horizontal force of 12 N is required to be applied on A how much max force can be applied on Bso that both A andB move together

Question: On an object of mass 1 kg moving along x-axis with constant speed 8m/s, a constant force 2 N is applied in positive y- direction. Find its speed after 4 seconds.

Please explain how to solve the above question. The answer is 8√2m/s.

^{2}, then the acceleration of 2 kg block is(1) 1 m/s

^{2}(4) 3 m/s^{2}(3) 4 m/s^{2}(4) 2 m/s^{2}a block of mass m is placed on a smooth wedge of inclination theta.the whole system is acclerated horizontally so that the block has a magnitude equal to???

The diagram shows the forces acting on a object. Find R and Ɵ. if the particle is moving with uniform velocity.

A Spring Of Force Constant k is cut into two pieces , such that one piece is doubled the lengthof other . Then the long piece will have a constant of...................?

1)A 70 kg man in sea is being lifted by a helicopter with the help of a rope which can bear a maximum tension of 100kg-wt. With what maximum acceleartion the helicopter should rise so that the rope may not break. [g=10m/s^2]

2)A bomb at rest explodes into 3 fragments of equal masses. Two fragments fly off at right angles to each other with velocities 9m/s and 12m/s respt. Calculate the speed of the third fragment.

3) A bus starts from rest accelerating uniformily with 4m/s^2. At t=10s, a stone is dropped out of a window of the bus 2m high. What are the magnitude of velocity and the acceleration of the stone at 10.2s?

why cricket player lowers his hands while catching a cricket ball?

m, such that the two blocks (5 kg and 6 kg) will move together, is(1) 44 kg (2) 22 kg (3) 40 kg (4) 4 kg

derive an expression for banking of road with the help of diagram?

a) 0.5

b) 0.75

c) 0.57

d) None of these

why wheels are made circular in automobiles?

1) 10root3 m /s

2) 20root m/s

3) 40/root3 m/s

4) 40 m/s

Why is pulling a lawn roller easier than pushing it?

A book of mass 5 kg is placed on a table and it is pressed by 10 N force. Then normal force exerted by the table on the book is?

Ans is 59 N.

How?

a stone is dropped from a height h . it hits the ground with a certain momentum P . if the same stone is dropped from a height 100% more than the previous height , the momentum when it hits the ground will change by ??

Find out the acceleration which will be produced when the nail fixed on the table is removed also find out the tension in the string during the motion of the bodies. What when the bodies stop. Take g = 10 N/kg.

How is a friction is a necessary evil?

radius 200 m is raised to make an angle of 150

with the horizontal.

a) Which force provides the necessary

centric petal force for a car taking the circular

track?

b) Name the process by which the outer

side of a curved track is raised a little above

the inner side.

c) Using the data provided in this case,

determine the maximum permissible speed to

avoid skidding (given s = 0.25 ).

trajectory it splits into three segments of masses m, m and 2m. First part falls vertically

downward with zero initial velocity and second part returns via same path to the point of

projection. The velocity of third part of mass 2m just after explosion will be

a) U cos theta b) 3/2 u cos theta c) 2u cos theta d) 5/2 u cos theta

Q. A vertical rectangular door with its centre of gravity at O (see Figure) is fixed on two hinges A and B along one vertical length side of the door. The entire weight of the door is supported by the hinge A. Then the free body force diagram for the door ( The arrows indicate the direction of the forces ) is :-

Q=A ball of mass 20 g hits a wall at an angle of 45^{o}with a velocity of 15 m/s.If the ball rebound at 90^{o}to the direction of incidence ,calculate the impulse received by the ball.1)What will happen when (a) a heavy body collides on a light mass at rest and (b) a light body collides on a heavy mass at rest?

define angle and coefficient of friction and find the relationship b/n them.

a )Mg tan (θ/2)

b) Mg cot (θ/2)

c) Mg sin θ/(1 + sin θ)

d) Mg sin (θ/2)

Find the value of T1 and T2 for the system shown in figure.

A man falls on a cemented floor and a man falls on a heap of sand who will get more hurt & why?

A child is sitting inside a lift in a multi-storey

building.

What will happen to the weight of the

child if?

i. The lift moves up with a

constant speed?

ii. The lift moves up with a

constant acceleration?

b) Write down expressions for the

apparent weight felt by the child when the

lift is:

i. ascending.

ii. Descending with a uniform

acceleration

ABCDEF is a regular hexagon,,, Prove that AB + AC + AD + AE + AF = 6AO.

(direction sign {--} is present on the top of AB , AC,AD,AE,AF and 6AO)

1. A block of mass 10kg is sliding on a surface inclined at a angle of 30

^{0}with the horizontal. Calculate the acceleration of the block. The coefficient of kinetic friction between the block and the surface is 0.5?Force of 16N and 12N are acting on a mass of 200kg in mutually perpendicular directions.Find the magnitude of acceleration produced?

how to solve this question with figure 3 blocks r connected together like on a horizontal frictionless table pulled to right with a force=50n if m1=5kg, m2=10kg, m3=15kg. find tension t1 and t2.

2. two masses of 7kg and 12kg r connectd at two end of light inextinsible string that goes over frictionless pulley. find acceleration of mass and tension on the string

prove that impulse is equal to the change in momentum

why friction is called a necessary evil?

the motion of a particle of mass m is described by y = ut + 1/2 gt

^{2}. find the force acting on the particle^{2}towards right. The acceleration of 20 kg mass at this instant is:-a) 12 m/s

^{2}b) 4 m/s

^{2}c) 10 m/s

^{2}d) Zero

1. prove that angle of repose is equal to angle of friction

2. prove that 2nd law of motion is the real law of motion. (what is real law of motion)

A child suspends a steel disc in a vertical plane by means of a thread.Then he shoots bullets on the disc by a toy gun.If mass of each bullet be 2g and the bullet striking the disc with a velocity of 11 m/s is returning with same velocity then what average force is being exerted on disc?The child is firing 3 bullets per second.

state the triangle law of vector addition and the parallelogram law of addition of vectors.

Two blocks of masses 2 kg. and 1 kg. are in contact with each other on a frictionless table . When a horizontal force of 3 N is applied to the block of mass 2 kg. the value of the force of contact between the two block is :(1) 4 N (2) 3N (3) 5 N (4) 1 N

a circular race track of radius 300 m is banked at an angle of 15

^{0}. if the coefficient of friction between the wheels of a race car and the road is 0.2 , what is the (i) optimum speed of the race car to avoid wear and tear on its tyres (ii) maximum permissible speed to avoid slipping ?plz experts help me out..............

a block of mass 2 kg rests on a rough inclined plane making an angle 30degrees with the horizontal . the coeffecient of static friction between the block and the plane is 0.7 . the frictional force on the block is??

(3) Along the wall

(4)Along any direction

(1) Along the perpendicular to the wan

(2) Both (1) & (2)

a body constrained to move along the z axis of a coordinate system is subjected to a constant force F = ( -i +2j +3k) N . what is the work done by the force in moving the body over a distance of 4 m along the z axis.

moving down with a uniform acceleration

of 5ms^ -2, what will be the apparent weight

of the child?

how did a thin air cushion of air maintained b/w solid surfaces can reduce friction?

^{2}) :-a) 760 N

b) 1360 N

c) 1580 N

d) 1620 N

Kindly answer sir/mam.

A block of mass 2kg hanged with a rope is going upward with an acceleration of 2ms-2..calculate the tension inthe rope?????