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Syllabus

DIFFERENTIATE BETWEEN SCALAR AND VECTOR QUANTITIES .

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

Q1. The following graph describes the motion of a girl going to meet her friend who stays 50 m from her house.

(a) How much time she takes to reach her friend's house ?

(b) What is the distance travelled by the girl during the time interval 0 to 12 min?

(c) During which time interval she is moving towards her house?

(d) For how many minutes she was at rest, during the entire journey?

(e) Calculate the speed by which she returned house.

list 10 scalar and 10 vector quantities related to motion.

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

What is the full form of CGS and SI?

A train covers half of its journey with a speed of 30m/s and other half with a speedof 40m/s. Calculate the average speed of the train during the whole journey.

give 5 examples of uniform circular motion ?

a) A car travels along a straight road 100m east and then 50m west. Find the distance and displacement of the car

b) A worker covers a distance of 40km from his house to his place of work and 10km towards his house back. Then the displacement covered by the worker in the whole trip is?

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

all cars r provided with seat belts why?

derive the third equation of motion : v

^{2}- u^{2}=2asgive 5 examples of uniform acceleration.

a)its acceleration

b)the force acting on the body

c)The change in momentum of in 2 seconds after start

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

Please answer by 7:30 pm todayif momentum of a body increases by 20 percent, then percentage increase in its kinetic energy is...

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

A stone weighing 3 kg falls from the top of a tower 100m high and buries itself 2m deep in the sand. the time of penetration is

Derive the following equations of motion graphically-

1) v = u + at

2) s = ut + 1/2at

^{2}What is To and Fro Motion? Explain with examples.derivation - equation of motion by graphical method

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 ?

Can u give me 9th cbse fa1 sample paper

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

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

differentiate between distance and displacement

A car travels a certain distance with a speed of 60 km/h and then returns back to the starting point with a speed of 50 km/h . Find the average speed and average velocity of the body .

Uniform circular motion is an accelerated motion . JUSTIFY THIS STATEMENT

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?

What is the basic difference between Motion and Rest ?

The table given below shows distance (in cm) travelled by the bodies A, B and C Read the data carefully B and C Read the data carefully and answers the questions which follow: Time Body A Body B Body C 1st Second 20 20 20 2nd Second 20 36 60 3rd Second 20 24 100 4th Second 20 30 140 5th Second 20 48 180 a) Which of the bodies is moving with: i) Constant speed ii) Constant acceleration b) Which of the three bodies covers :- i) Maximum distance in third second ii) Minimum distance in third second c) Which of the body is moving with non- uniform acceleration d) Sketch a distance- time graph for motion of I) Body A ii) Body C e) How much distance is covered by body C in 5s f) How much distance is covered by body B in last 3s g) Which of the bodies covers least distance in first three second

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?

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

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?

what are the similarities between distance and displacement ?state four differences between distance and displacement

Difference between uniform and non - uniform motion.

give an example to show that displacement can be negative?

S=ut+1/2at

^{2 }prove by graphical method.explain different types of motion with dailylife examples.

## IF THE LINEAR SPEED OF MINUTE HAND HAND OF WALL CLOCK IS 3.14 * 10^-4 M/SEC THEN LENGTH OF MINUTE HAND IS

1. 18 CM

2. 1800 CM

3. 3.14 CM

4. 314 CM

example for acceleration against the direction of motion

a) Uniform acceleration

b) Non Uniform acceleration

c) Retardation

d) Constant speed

No link please.

3 difference between fundamental and derived physical quantities

(A) 30 N

(B) 55 N

(C) 20 N

(D) 85 N

rest and motion are relative terms. Explain.

a truck is moving on a straight road with constant acceleration. The initial velocity of car is 4ms and after 10 seconds its velocity becomes 16ms . calculate

a) acceleration of truck

b) distance travelled by truck in 10 seconds

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...

^{3}, where the time t is inseconds. The particle is momentarily at rest at t =

A. 0.75 s

B. 1.3 s

C. 5.3 s

D. 7.3 s

E. 9.3 s

ans: B

give some examples of accelerated motion in everyday life

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

what are the full forms of v, u, at, s, in chapter 8 motiona. At what time was the car stopped?

b. At what time did the car have the greatest velocity?

c. What was the greatest velocity?

d. At what time(s) was the car accelerating?

e. Calculate the distance covered by the car in first two hours

f. Calculate the acceleration of the car from ‘E’ to ‘F’

g. How long the car does has zero acceleration?

h. Describe the journey of the car from ‘C’ to ‘D’

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 ?

An aeroplane lands on a runway and comes to standstill in 20s,when the breaking force acting on its wheel produces a retardation of 5m/s

^{2},find the initial velocity of the aeroplane during touch down in SI units.Derive the equation :

^{2}Calulate the displacement of the object in 0-350 sec

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

- (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, findA 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.

(a) speedometer (b) odometer

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.

can a body have constant speed and still be accelerating?

Difference between mass and weight

a body can have zero average velocity but not zero average speed . justify

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?A ball is placed at rest at the top of a hill. It travels with constant acceleration for the first 12 second and reaches a speed of 4m/s. It then decelerates at a constant rate of 0.1m/s2 for 20 seconds. It then travels at a constant speed for a further 18 seconds. Draw a speed-time graph for the ball over the course of this 50 seconds.An electric train is moving with a velocity of 120 km/ hr. How much distance will it move in 30 seconds.

the distance moved by a student at a different intervals of time, while walking to school, is given in the table below

t(s) 0 10 20 30 40 50

s(m) 0 15 30 45 30 60

draw speed time graph for the motion of the student what does the shape of the graph suggest about the type of motion?

(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

Give two examples of bodies having non-uniform motion

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.

When are the following true for the path length?

(i) it is zero

(ii) it is greater than the magnitude of displacement of the object.

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

- Calculate the magnitude of displacement of the truck in 15 seconds.
- During which part of the journey was the truck decelerating?
- Calculate the magnitude of average velocity of the truck

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 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

State the reason why velocity-time graph can never be a straight line parallel to velocity-axis?