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Syllabus

DIFFERENTIATE BETWEEN SCALAR AND VECTOR QUANTITIES .

what is the formula for retardation5 examples of uniform and Non-uniform motion.??

list 10 scalar and 10 vector quantities related to motion.

1. less than one 2. greater than one 3. equal to one 4. greater than or equal to one

What is the full form of CGS and SI?

Can the displacement be greater than the distance travelled by an object ?

give 5 examples of uniform circular motion ?

can the equation v = u+at be used for a particle moving with nonuniform acceleration ?

Please explain the derivation of the equations of motion by graphical method.

derive the third equation of motion : v

^{2}- u^{2}=2asif momentum of a body increases by 20 percent, then percentage increase in its kinetic energy is...

1. positive , positive 2. positive , negative 3. negative , negative 4. negative , positive

give 5 examples of uniform acceleration.

Can a body have zero velocity and still acceleration? give examples,

Please answer by 7:30 pm todayof 4m/s2. Its average velocity as it goes from x = 2m to x = 8m is:

A. 1m/s

B. 2m/s

C. 3m/s

D. 5m/s

E. 6m/s

ans: E

how to draw the distance - time graph for activity 8.9 and activity 8.10 in page number 106 and 107

What is To and Fro Motion? Explain with examples.Derive the following equations of motion graphically-

1) v = u + at

2) s = ut + 1/2at

^{2}a) Uniform acceleration

b) Non Uniform acceleration

c) Retardation

d) Constant speed

No link please.

derivation - equation of motion by graphical method

Can u give me 9th cbse fa1 sample paper

what are the difference between uniform linear and uniform circular motion? explain with example.

differentiate between distance and displacement

Uniform circular motion is an accelerated motion . JUSTIFY THIS STATEMENT

[1] A stone thrown upwards attains a maximum height of 39.2 m. find the velocity which it was thrown

ans. 14 m/s

[2] A ball is thrown upwards with a speed of 19.6 m/s. Calculate [a] the maximum height it reaches , and [b] the time taken in reaching the maximum height [c] time to return its original position

ans. [a] 19.6 m [b] 2 s [c[ 4 s

pls say the method

What is the basic difference between Motion and Rest ?

a cricket ball of mass 70g moving with a velocity of 0.5m/s is stopped by a player in 0.5s . what is the force applied by the player to stop the ball

A body is moving along a circular path of radius(R). What will be the distance and displacement of the body when it completes half revolution?

What is the momentum of a body of mass 200g moving with a velocity of 15m/s?

ABDUL WHILE DRIVING TO SCHOOL COMPUTES THE AVERAGE SPEED FOR HIS TRIP TO BE 20 KM/HOUR. ON HIS RETURN TRIP ALONG THE SAME ROUTE , THERE IS LESS TRAFFIC AND THE AVERAGE SPEED IS 30 KM/HOUR. WHAT IS THE AVERAGE SPEED FOR ABDUL'S TRIP?

A simple pendulum hangs from the roof of a train .The string is inclined towards the rear of the train.What is the nature of motion of train ?

a) Uniform b) Accelerated c) Retarded d) At rest

state four differences between distance and displacement

a) Define uniform acceleration. What is the acceleration of the body movingwith uniform velocity?b) A particle moves over three quarters of a circle of radius r. What is themagnitude of its displacement?

Difference between uniform and non - uniform motion.

(a) speedometer (b) odometer

An object moving with a speed of 5 m/s comes to rest in 10 s, after the brakes are applied. What is the initial velocity?

give an example to show that displacement can be negative?

Dispersion

Tyndall effect

Brownian movement

Oscillation

S=ut+1/2at

^{2 }prove by graphical method.A body travels 200cm in the 1st 2 s and 220cm in the next 5 s.Calculate the velocity at the end of 7th second from start ? It's answer is 2.22 m/s

explain different types of motion with dailylife examples.

example for acceleration against the direction of motion

3 difference between fundamental and derived physical quantities

a) Draw the distance- time graph to show the following kind of motions of a body

1) If the boy is moving ith uniform velocity

2) If the body initially moves with uniform velocity and then stops suddenly

3) If the body is stationary.

b) When can an object in motion be considered a point object?

rest and motion are relative terms. Explain.

1.The numerical ratio of displacement to distance for a moving object is:

a)always less than 1

b)always equal to 1

c)always grater than 1

d)equal to or less than 1

explain too...

give some examples of accelerated motion in everyday life

when a graph of one quantity versus another results in a straight line the quantities are:

a.] both constant

b.] equal

c.] directly proportional

d.]inversely proportional

Under what condition is the magnitude of average velocity of an object equal to it's average speed?

Ram hired a 3 wheeler from bus stand to his house. The driver A of 3 wheeler followed the shortest path and reached the destination in 1/2 an hour and charged Rs 50 from Ram. On the same day Ram's sister also came her house after attending a function in other city. She also came hired a 3 wheeler the diver B of 3 wheeler took an hour to reach and charged Rs 150 from her.

a) Is the displacement , between Bus stand and Ram house is same in both case?

b) What value are shown by A ?

A ball is dropped on the floor from the height of 10m. It rebounds to a height of 2.5m. If the ball is in contact with the floor for 0.01 seconds, what is the average acceleration during contact ?

Derive the equation :

^{2}A boy tries to hit a bird by throwing stone vertically upward but the stone misses the bird. The stone goes upward in the air for 3s. While returning after 1s the stone hits the bird.

EXPLAIN WHETHER THE WALLS OF A CLASSROOM ARE AT REST OR IN MOTION?

A train starting from rest attains a velocity of 72 km/h in 5 minutes. Assuming that the acceeration is uniform. Find the acceleration and the distance traveed by the train for attaining this velocity.

Q what is the displacement of a satilite when it makes a complete round along around its circular path of radius. caculate its distance and displacement in its half of perdioc time?

draw a velocity versus time graph of a stone thrown vertically upwards with a velocity v and then coming downwards after attaining the maximum height.

a ball thrown upwards reaches point P of its path at the end of 4 seconds and the highest point Q at the end of 12 seconds. After how many seconds from the start will it reach point P again

(a) Draw a graph if x versus t for t=0 and t=5 sec

(b) What is the displacement come out of the particles initially?

(c) What is slope of the graph obtained?

Difference between mass and weight

_{r}and a_{t }represent radial and tangential acceleration, the motion of a particle will be uniform circular motion ifa) a

_{r}=0 and a_{t }=0b) a

_{r}= 0 but a_{t }is not zeroc) a

_{r}not zero , but a_{t }= 0d) a

_{r}and a_{t }are both not zeroa body can have zero average velocity but not zero average speed . justify

An object is moving along x-axis in such a way that its displacement is given by x=30 + 20t^2 where, x is in metres and t is in seconds.

(a) Find the velocity and acceleration.

(b) What is the initial position and the velocity of the object?

A body covers 4m in 3^{rd}second and 12m in 5^{th}second. If the motion is uniformly accelerated, how far will it travel in the next 3 seconds?what is the shape of the path of a body when it is in uniform motion

An electric train is moving with a velocity of 120 km/ hr. How much distance will it move in 30 seconds.

- (a) Derive the equation of motion v = u +at, using graphical method.

(b) A train starting from rest attains a velocity of 72 km/h in 5 minutes. Assuming the acceleration is uniform, findwhat are the similarities between distance and displacement ?(1) 2 m/s (2) 4 m/s (3) 6 m/s (4) 8 m/s

Give two examples of bodies having non-uniform motion

A force of 15N acts for 5s on a body of mass 5kg which is initially at rest.Calculate:-

A car starts from rest and accelerates uniformly for 10 s to a velocity of 8 m/s. It then runs at a constant velocity and is finally brought to rest in 64 m with a constant retardation. The total distance covered by the car is 584 m. Find the value of acceleration, retardation and total time taken.

(in seconds) are given by

particle 1: x(t) = 3.5 − 2.7t3

particle 2: x(t) = 3.5 +2.7t3

particle 3: x(t) = 3.5 +2.7t2

particle 4: x(t) = 3.5 − 3.4t − 2.7t2

Which of these particles is speeding up for t > 0?

A. All four

B. Only 1

C. Only 2 and 3

D. Only 2, 3, and 4

E. None of them

ans: A

what type of motion uniform or non-uniform is exhibited by a freely falling body? give reasons for your answer

An object thrown upwards reaches the highest point in 5s . Find the velocity with which it ws thrown . Also find the displacement ... Pls ans .... 2mrw is ma exam ......

A car accelerates uniformly from 18 km/h to 36 km/h in 5 seconds.

calculate the -

a)acceleration

b)distance covered by the car

A boy, standing at pointA, throws a stone, which travels its path uptoBas shown below. At the top of its path, the stone has ____.

Why is d motion of an athlete moving along with circular path an accelerated motion?