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Syllabus

DIFFERENTIATE BETWEEN SCALAR AND VECTOR QUANTITIES .

Name the physical quantity represented by the slope of a position time graph and give it,s si unit also.

5 examples of uniform and Non-uniform motion.??

what are the full forms of v, u, at, s, in chapter 8 motionlist 10 scalar and 10 vector quantities related to motion.

What is the nature of the displacement versus time graph for non uniform motion ? Give an example.

Please answerWhat is the full form of CGS and SI?

A driver of a car travelling at 52km/h applied brakes and accelerates uniformly in opposite direction. The car stops in 5 seconds. Another driver going in 3km/h in another car applies brake in 10 seconds.On the same graph paper plot the speed verses time graph for the twp cars. Which car travelled farther after the brakes were applied?give 5 examples of uniform circular motion ?

can a particle be acclerated:-

a) if its speed is constant.

b) if its velocity is constant.

Give Reason.

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

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.

derive the third equation of motion : v

^{2}- u^{2}=2asIt takes 6 minutes for the signal sent by an artificial satellite orbiting around the earth to reach the ground station . Calculate the distance of the artificial satellite from the ground station . The signal travels at a speed of the light that is 3×10 raised to 8 m/s

what is the formula for retardationgive 5 examples of uniform acceleration.

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

Please answer by 7:30 pm todayAn object moving with initial velocity

ualong a straight line attains maximum velocityvafter travelling distances. Assume the acceleration is uniform. Derive the relationship between position and velocity of the object by graphical method.Please answer

if 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

Derive the following equations of motion graphically-

1) v = u + at

2) s = ut + 1/2at

^{2}Urgent

Ask

derivation - equation of motion by graphical method

Can u give me 9th cbse fa1 sample paper

Q: An ant climbs up 5 steps each width 20cm and height 20cm. Find the distance covered and displacement?

Answer: Distance covered in each step = 20+20 = 40cm

Total Distance = 40×5 = 200cm

Displacement in each step=

Total Displacement=

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

An object is dropped from a height of 120m. The acceleration of the object is 10m/s

^{2}downwards. Find the distance travelled by the object after (a)1s (b)2s and (c) 3s. What is the vilocity of the object after 3s?differentiate between distance and displacement

Time (h) 11.00 11.30 12.00 12.30 1.00

Distance 0 30 30 65 100

(km)

Plot the graph.

Uniform circular motion is an accelerated motion . JUSTIFY THIS STATEMENT

Give one example of the following :

a)positive acceleration

b)negative acceleration

c)uniform acceleration

What is the basic difference between Motion and Rest ?

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?

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?

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?

2. The numerical ratio of covering the distance directly proportional to the square of the time. The acceleration of the body is.

(A) <1 (B) =1 (C) >1 (D) $\le $1

3. A moving body is covering distance directly proportional to the square of the time. The acceleration of the body is.

(A) increasing (B) decreasing (C) zero (D) constant

state four differences between distance and displacement

Is it 320/8 =40 km/hr

Difference between uniform and non - uniform motion.

A car moving with a speed of 54km/h is brought to rest within 10sec by applying break find the retardation due to breaks?

give an example to show that displacement can be negative?

Name the physical quantity that corresponds to the rate of change velocity????

S=ut+1/2at

^{2 }prove by graphical method.Vikram drove his car for 2 hours at the rate of 60 km per hour and then 3 hours at 50 km per hour.Find the average speed of his journey?

explain different types of motion with dailylife examples.

example for acceleration against the direction of motion

what is the speed with which a stone leaves a string if it is let go when the length of the string holding the stone is 0.7m and is revolving at 3 revolutions pre second

3 difference between fundamental and derived physical quantities

give one type of motion in which distance and displacement are same

rest and motion are relative terms. Explain.

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

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...

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

give some examples of accelerated motion in everyday life

What is To and Fro Motion? Explain with examples.Under what condition is the magnitude of average velocity of an object equal to it's average speed?

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

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

station A

arrival depart

A 0 08;00 08;15

B 120 11;15 11;30

C 180 13;00 13;15

plot and interprut the time graph for the train assuming that its motion between any two stations is uniform. (pg no 106 NCERT text book) table 8.4

pls.

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.

A motor car is travelling at 36 km/hr.After 10 sec., the velocity becomes 54 km/hr.Assuming the velocity change took place at auniform rate, find the acceleration.

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 boy runs first 100m with a unifrom speed of 8m/s and the next 200m with a uniform speed of 5m/s. cal culate the avarge speed of the boy?

Difference between mass and weight

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

Define uniform circular motion. Explain with the help of a diagram why is it called an accelerated motion? Give an example of this kind of motion.

B) Give an expression for the speed of an athelete if he takes time t to go around a circular track of radius 'r'

C) A Cyclist takes five round of a circular track of diametere 196M is 25 min. Calculate his speed.

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 boy is running on a straight road.he runs 500 m towards north in 2 min 10 seconds and then turns back and runs 200m in 1 minute. calculate his average speed and magnitude of average velocity during first 2 minutes 10 seconds

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

1. Distinguish between distance and displacement for

a) an object moving along a straight line

b)an object moving in a plane

2. Give an example where the speed on object first increases,then remains constant for some time,and then decreases.

3.A girl bends to touch her toes.Is the motion of her head an example of uniform motion or accelerated motion.Explain.

what are the similarities between distance and displacement ?(a) What is the distance covered by the vehicle?

(b) What is its displacement?

Give two examples of bodies having non-uniform motion

que - a scooter moves 45 km on one litre of petrol . in a journey , the scooter used up one litre of petrol . is it necessary that the displacement of the scooter in the journey is 45 km ? is it possible that the displacement is 45 km .

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.

a)compare a block of wood, water and air on the basis of the following

1 compressibility

2 particle motion

3 rigidity

b)account for the following

1 gassesexert pressure on the walls of the container

2 liquid can be called as fluids

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

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

displacement, temperature, force, weight, power, work and energy.

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