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 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

State and prove law of conservation of linear momentum

Friction is a necessary evil.Explain

in formula F=DP/DT, d stands for what?

falls with his head forward. What should he

do in order to land safely

State and prove the conservation of angular momentum.

A particle of mass

mmoves with constant speedvon a circular path of radiusr. Find the magnitude of average force on it in half revolution.moving down with a uniform acceleration

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

of the child?

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 lift which is moving vertically downwards

with an acceleration of 1.8 m/s2

a) Will the passenger experience

decease or an increase in his weight/

Explain?

b) What will be the effect if the cable is

cut and the lift falls freely?

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 body is initially at rest.A net force F acting on it varies with time.Then prove that the body can not remain at rest.

surfaces in contact; when there is a relative

motion between them. Consider a car moving

over a horizontal road. What will be the

direction of frictional force acting between the

road and tyre?

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 ?

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

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}Q4. The value of | T

_{1}– T_{2}| , in the given diagram, isshow that for two complementary angles of projection of a projectile thrown with thw same velocity. the horizontal ranges are equal

force depends on the rate of change of

momentum.

a) State whether the force is external or

internal? Justify your answer.

b) What happens to the linear

momentum when the force is absent?

c) The motion of a particle of mass m is

described y = ut +1 /2 gt^2 . find the

force acting on the particle.

d) Why is it more difficult to rotate a

stone by tying it to a longer string than

a shorter string?

prove Lami's theorem.

Car moving at speed 'u', applied brakes with constant retardation. If speed of car reduces to ?u/2 in 30 Minuttes , then total distance travelled by car before coming to rest is

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

or False. Correct the statements if false.

i. A spring balance gives the mass of a

body while a common balance gives

its weight.

ii. If the same force is applied on two

bodies of different masses for the

same time, then the change in

momentum of two bodies is the same.

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.

. If both speed of a body and radius of the circular path are doubled, what will be the change in centripetal force ?

^{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???

II) velocity

iii) acceleration

iv) time period

of a particle executing SHM. plz. Answer fast tom examzzz..

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...................?

a body of mass 0.5kg undergoes a change of velocity of 4cm/s in 4 second .what is the force acting on it?????

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

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?

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

why wheels are made circular in automobiles?

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?

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 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 ??

A rubber ball of mass 100 g falls from a height of 1m and rebounds to a height of 40 cm.Find the impulse and the average force between the ball and the ground, if time during which they are in contact was 0.1 sec.

How is a friction is a necessary evil?

Three forces F1,F2 and F3 are simultaneously acting on a particle of mass 'm' and keep it in equilibrium .If F1 force were reversed in direction only, the acceleration of the particle will be1. F1/m

2. 2 F1/m

3. -F1/m

4. -2F1/m

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

1. zero

2. less than g

3. equal to g

4. greater than g

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.what is normal reaction force?

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

The velocity of Van is given as :

v = (9t - t

^{2}+10) m/s, where t is in secondCoefficient of friction between the wall of van and block of m kg is u. The block is at rest w.r.t. van initially. The friction time graph between block and van is given as (g = 10 m/s

^{2}).(A) The value of mass of block is 10 kg

(B) The coefficient of friction (u) is 2

(C) The acceleration of block at t = 3 sec is 5 m/sec.

^{2}(D) The coefficient of friction (u) is 1

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 ).

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

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)

$A)\frac{10}{3}m/{s}^{2}B)\frac{7}{3}m/{s}^{2}C)0.5m/{s}^{2}D)1.0m/{s}^{2}$

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?(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

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)

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

46. The speed-time graph for the motion of a motorcycle is shown here. What is the average speed over 12 s interval ?

A. 4.38 m s

^{-1}B. 5.58 m s

^{-1}C. 1.75 m s

^{-1}D. 3.17 m s

^{-1 }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

1. A block of mass 5 kg is placed over smooth horizontal surface. A force F=5 kt. is being applied where t is time in second. F in Newton and k is constant (k=1.0 N sec

^{-1}). Find work by the force F, from time t=0 to the time just before it is being lift of the table.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??

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.

with outer edge raised to make 5 degrees with

the horizontal.

Calculate the permissible speed of the car

if the coefficient of friction is 0.2.

^{2}) :-a) 760 N

b) 1360 N

c) 1580 N

d) 1620 N

Kindly answer sir/mam.

What is the nature of motion of an object falling freely under the action of gravity?