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Syllabus

DIFFERENTIATE BETWEEN SCALAR AND VECTOR QUANTITIES .

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

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

A brick falls off the top of a wall under construction and drops into a bed of sand 14.5 m below. It makes a dent in the sand 185 mm deep. What is the speed of the brick just before it hit the sand its deceleration in the sand and time it takes to fall?

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?

give 5 examples of uniform circular motion ?

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

derive the third equation of motion : v

^{2}- u^{2}=2aswhen 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

what is the formula for retardationa) Uniform acceleration

b) Non Uniform acceleration

c) Retardation

d) Constant speed

No link please.

give 5 examples of uniform acceleration.

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

Please answer by 7:30 pm todaywhat are the full forms of v, u, at, s, in chapter 8 motionif momentum of a body increases by 20 percent, then percentage increase in its kinetic energy is...

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

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}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.

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

differentiate between distance and displacement

(i) What is the distance travelled by the car in the first 2 seconds?

(ii) What is the braking force at the end of 5 seconds to bring the car to a stop within one second?

(b) Derive the equation S = ut + 1/2 at square using graphical method.

Uniform circular motion is an accelerated motion . JUSTIFY THIS STATEMENT

What is the basic difference between Motion and Rest ?

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?

^{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

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?

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?

state four differences between distance and displacement

her right and covers a distance of 3 km to reach her school. Meanwhile her brother Bujo

takes a short and direct route to reach the school.

What is the difference between the displacements of Paheli and Bujo?

(a)0 km

(b)0.5 km

(c)1 km

(d)1.5 Km

Difference between uniform and non - uniform motion.

What is To and Fro Motion? Explain with examples.(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?

give an example to show that displacement can be negative?

S=ut+1/2at

^{2 }prove by graphical method.When to use s=ut+1/2at

^{2 }and when 2as=v^{2}-u^{2}explain different types of motion with dailylife examples.

^{2}, where v is in m/s andt is in seconds. Its average velocity over the interval from t = 0 to t = 2s:

A. is 0

B. is −2m/s

C. is 2m/s

D. is −4m/s

E. cannot be calculated unless the initial position is given

ans: A

example for acceleration against the direction of motion

3 difference between fundamental and derived physical quantities

(a) How long does it take to reach the ground?

(b) What is the velocity with which it will strike the ground?

rest and motion are relative terms. Explain.

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

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...

Explain whether force is balanced or unbalanced force

1) a suitcase is dropped from certain height.

2) Biscle is moving in straight line with constant velocity.

3) In game of tug of war , the two teams apply force but the rope does not move

4) a ball rolling on ground stops after sometime.

give some examples of accelerated motion in everyday life

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 .

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

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 ?

what are the similarities between distance and displacement ?Derive the equation :

^{2}Two identical balls are at rest side by side at the bottom of a hill. Sometime after ball A is kicked up the hill, ball B is given a kick up the hill. Ball A is headed downhill when it passes ball B headed up the hill. At the instant when ball A passes ballB, it has the same

(A) Position and velocity as ball B

(B) Position and acceleration as ball B

(C)Velocity and acceleration as ball B

(D)Displacement and velocity as ball B

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

a The slope of distance time graph

b The are under velocity time graph

c The slope of velocity time graph

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.

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.

If the initial velocity is zero then the force acting is:-

Difference between mass and weight

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

a pin

an ink pot

your body

textbook

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

Give two examples of bodies having non-uniform motion

A ball is attached to the end of a horizontal cord is revolved in a circle of radius 2 m at a constant speed of 60rpm. Determine,

a) the magnitude of angular speed after 2 seconds

b) the angular displacement after 1 minute

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 boy hits a football high up into d air. He runs and catches d football before it hits d ground. Which of two, d boy or d football has greater displacement?

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

1 A child completes a circular track of 200 m length in 10 seconds. Calculate a) speed, b) velocity.

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

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 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

A particle moves along a straight line with a constant acceleration a = +0.5 m/s 2 At t= 0 it is at x = 0, and its velocity is v = 0. Plot the velocity-time and position-time graphs for the period t = 0 to t = 5 s.