Question 1.. In the given displacement-time graph, we observe that the body ____.
A. is at rest B. has some initial speed C. moves with constant acceleration D. moves with constant velocity
Question 2. When a graph between two physical quantities is a straight line, then, the two quantities are
A. constant B. independent C. directly proportional D. inversely proportional
Question 3. In the given velocity-time graph, AB shows that the body has ____.
A. uniform acceleration B. uniform retardation C. uniform velocity D. non-uniform velocity
Question 4. In the velocity-time graph, the distance travelled by the particle between 0 s and 4 s is ____ m.
A. 50
B. 40
C. 30
D. 20
Question 5. Given velocity-time graph AB, shows that the body has ____.
A. uniform acceleration
B. non uniform retardation
C. uniform speed
D. initial velocity OA and is moving with uniform retardation
Question 6.. A truck running along a straight line increases its speed uniformly from 30 m/s to 60 m/s, over a time interval of 1 minute. The distance travelled during this time interval is ____ m.
A. 900
B. 1800
C. 2700
D. 360
Question 7. The velocity-time graph of a body is as shown. The displacement suffered by it is ____ m.
A. 300
B. 400
C. 250
D. 200
Question 8. A moving toy is brought to rest within 1.2 s by applying the brakes. Then the initial velocity is ____ m/s, if the retardation is 0.2 m/s2.
A. 2.4
B. 0.24
C. 24
D. 25
Question 9. When a fireman directs a powerful stream of water on a fire from a hose-pipe, the hose-pipe tends to go backward. This is due to:
1. Law of Inertia
2. Law of conservation of energy
3. Newton's 3rd law
4. Law of conservation of charges
Question 10.. When a running bus stops suddenly, the passengers tend to fall in the forward direction. This is due to:
Mass of the bus
Inertia of motion
Inertia
Inertia of rest
Question 11. The acceleration of an object is inversely proportional to:
Velocity.
Mass.
Momentum.
Force.
Question 12. Two spring balances hooked and pull each other in opposite directions. If the reading of one spring balance is 2 N, the reading shown by the second spring balance will be:
2.0 N
3.0 N
2.5 N
4.0 N
Question 13. In high jump competition the athlete is made to fall on a cushioned bed to:
Make him sleep comfortably.
Increase the time to stop.
To decrease his momentum fast.
Make him stop quickly.
Question 16
Question 14.Name the physical quantity associated with N kg-1 .
accelaration
momentum
impulse
veocity
Question 15. Action and reaction forces are _____. They produce _________accelerations in the two bodies, if the mass of the bodies are equal.
Equal and opposite, equal and opposite
Equal and opposite, not necessarily equal and opposite
Not necessarily equal and opposite, equal and opposite
Not necessarily equal and opposite, not necessarily equal and opposite
Question 16. If a person can jump to a height of 9m on the moon, the height to which he can jump on the earth with the same effort is:
3.5 m
1.5 m
2.5 m
6 m
Question 17. Why a fan continues to move for sometime even after it has been switched off?
Question 18. Calculate the force of gravitation between the earth and the sun. [Given that the mass of the earth = 6 x 1024 kg, mass of the sun = 2 x 1030 kg, average distance between the two is 1.5 x 10-11 m and G = 6.67 x 10-11 Nm2kg-2 ].(ans 35.6 * 10 21)
Question 19. (a) Distinguish between mass and weight of an object.
(b) How will the weight of a body of mass 100g change if it is taken from equator to the poles? Give reason for your answer.
Question 15. State and explain the Universal Law of Gravitation.
Question 20. A stone is dropped from a cliff 98 m high.
(a) How long will it take to fall to the foot of the cliff?
(b) What will be its speed when it strikes the ground?
(Ans 4.47 secs, 43.826 m/s)
(Q.21) A 1000 kg truck moving with a speed of 20 m/s is brought to rest within a distance of 50 m by applying brakes that provide uniform retardation.
(A) The retardation = – 2 m s-2
(B) The retardation = –4 m s-2
(C) Retarding force= – 4000 N
(D) Retarding force= – 8000 N
(Q.22) A student drives 4.8-km trip to school and averages a speed of 22.6 m/s. On the return trip home, the student travels with an average speed of 16.8 m/s over the same distance. What is the average speed (in m/s) of the student for the two-way trip?
(Q.23) A bullet leaves a rifle with a muzzle velocity of 521 m/s. While accelerating through the barrel of
the rifle, the bullet moves a distance of 0.840 m. Determine the acceleration of the bullet (assume a
uniform acceleration).
Question 24. On moving down the group the atomic radii _______ .
decreases
remains constant
first increases than decreases
increases
Question 25. Which scientist stated that the atomic mass of the middle element was roughly the average of the atomic masses of the other two elements?
Mendeleev
Newland
Dobereiner
William Prout
Question 6
Question 26. Metallic character _______ and non-metallic character _______ from left to right in a period.
remains same, increases
remains same, decreases
decreases, increases
increases, decreases
Question 27. In modern periodic Law the properties of the elements are periodic function of their _______ .
atomic number
density
atomic mass
atomic volume
Question 28. How many triads could Dobereiner identify from the elements known at that time?
3
2
4
5
Question 29. Which one of the following does not increase while moving down the group in the periodic table?
Valence electrons
Atomic radius
Shells in the atoms
Metallic character
Question 30. Which law states that the properties of the elements are a periodic function of their atomic masses?
Dobereiner's Law
Mendeleev's Periodic Law
Modern periodic law
Newland's Law
Question 31. Who proposed the "Law of Octaves"?
J.W. Dobereiner
John Newland
William Prout
Lothar Meyer
Question 32. The f-block elements are called as _______ .
Representative elements
Transition elements
Noble gases
Inner transition elements
Question 33. The Law of Octaves was applicable only upto element ________.
Calcium
Zinc
Copper
Sodium
Question 34. What are the main features of Mendeleev’s Periodic Table?
Question 35
(i)How many elements are present in- third period , (ii) Sixth period
What were the limitations of Dobereiner's classification of elements?
A. is at rest B. has some initial speed C. moves with constant acceleration D. moves with constant velocity
Question 2. When a graph between two physical quantities is a straight line, then, the two quantities are
A. constant B. independent C. directly proportional D. inversely proportional
Question 3. In the given velocity-time graph, AB shows that the body has ____.
A. uniform acceleration B. uniform retardation C. uniform velocity D. non-uniform velocity
Question 4. In the velocity-time graph, the distance travelled by the particle between 0 s and 4 s is ____ m.
A. 50
B. 40
C. 30
D. 20
Question 5. Given velocity-time graph AB, shows that the body has ____.
A. uniform acceleration
B. non uniform retardation
C. uniform speed
D. initial velocity OA and is moving with uniform retardation
Question 6.. A truck running along a straight line increases its speed uniformly from 30 m/s to 60 m/s, over a time interval of 1 minute. The distance travelled during this time interval is ____ m.
A. 900
B. 1800
C. 2700
D. 360
Question 7. The velocity-time graph of a body is as shown. The displacement suffered by it is ____ m.
A. 300
B. 400
C. 250
D. 200
Question 8. A moving toy is brought to rest within 1.2 s by applying the brakes. Then the initial velocity is ____ m/s, if the retardation is 0.2 m/s2.
A. 2.4
B. 0.24
C. 24
D. 25
Question 9. When a fireman directs a powerful stream of water on a fire from a hose-pipe, the hose-pipe tends to go backward. This is due to:
1. Law of Inertia
2. Law of conservation of energy
3. Newton's 3rd law
4. Law of conservation of charges
Question 10.. When a running bus stops suddenly, the passengers tend to fall in the forward direction. This is due to:
Mass of the bus
Inertia of motion
Inertia
Inertia of rest
Question 11. The acceleration of an object is inversely proportional to:
Velocity.
Mass.
Momentum.
Force.
Question 12. Two spring balances hooked and pull each other in opposite directions. If the reading of one spring balance is 2 N, the reading shown by the second spring balance will be:
2.0 N
3.0 N
2.5 N
4.0 N
Question 13. In high jump competition the athlete is made to fall on a cushioned bed to:
Make him sleep comfortably.
Increase the time to stop.
To decrease his momentum fast.
Make him stop quickly.
Question 16
Question 14.Name the physical quantity associated with N kg-1 .
accelaration
momentum
impulse
veocity
Question 15. Action and reaction forces are _____. They produce _________accelerations in the two bodies, if the mass of the bodies are equal.
Equal and opposite, equal and opposite
Equal and opposite, not necessarily equal and opposite
Not necessarily equal and opposite, equal and opposite
Not necessarily equal and opposite, not necessarily equal and opposite
Question 16. If a person can jump to a height of 9m on the moon, the height to which he can jump on the earth with the same effort is:
3.5 m
1.5 m
2.5 m
6 m
Question 17. Why a fan continues to move for sometime even after it has been switched off?
Question 18. Calculate the force of gravitation between the earth and the sun. [Given that the mass of the earth = 6 x 1024 kg, mass of the sun = 2 x 1030 kg, average distance between the two is 1.5 x 10-11 m and G = 6.67 x 10-11 Nm2kg-2 ].(ans 35.6 * 10 21)
Question 19. (a) Distinguish between mass and weight of an object.
(b) How will the weight of a body of mass 100g change if it is taken from equator to the poles? Give reason for your answer.
Question 15. State and explain the Universal Law of Gravitation.
Question 20. A stone is dropped from a cliff 98 m high.
(a) How long will it take to fall to the foot of the cliff?
(b) What will be its speed when it strikes the ground?
(Ans 4.47 secs, 43.826 m/s)
(Q.21) A 1000 kg truck moving with a speed of 20 m/s is brought to rest within a distance of 50 m by applying brakes that provide uniform retardation.
(A) The retardation = – 2 m s-2
(B) The retardation = –4 m s-2
(C) Retarding force= – 4000 N
(D) Retarding force= – 8000 N
(Q.22) A student drives 4.8-km trip to school and averages a speed of 22.6 m/s. On the return trip home, the student travels with an average speed of 16.8 m/s over the same distance. What is the average speed (in m/s) of the student for the two-way trip?
(Q.23) A bullet leaves a rifle with a muzzle velocity of 521 m/s. While accelerating through the barrel of
the rifle, the bullet moves a distance of 0.840 m. Determine the acceleration of the bullet (assume a
uniform acceleration).
Question 24. On moving down the group the atomic radii _______ .
decreases
remains constant
first increases than decreases
increases
Question 25. Which scientist stated that the atomic mass of the middle element was roughly the average of the atomic masses of the other two elements?
Mendeleev
Newland
Dobereiner
William Prout
Question 6
Question 26. Metallic character _______ and non-metallic character _______ from left to right in a period.
remains same, increases
remains same, decreases
decreases, increases
increases, decreases
Question 27. In modern periodic Law the properties of the elements are periodic function of their _______ .
atomic number
density
atomic mass
atomic volume
Question 28. How many triads could Dobereiner identify from the elements known at that time?
3
2
4
5
Question 29. Which one of the following does not increase while moving down the group in the periodic table?
Valence electrons
Atomic radius
Shells in the atoms
Metallic character
Question 30. Which law states that the properties of the elements are a periodic function of their atomic masses?
Dobereiner's Law
Mendeleev's Periodic Law
Modern periodic law
Newland's Law
Question 31. Who proposed the "Law of Octaves"?
J.W. Dobereiner
John Newland
William Prout
Lothar Meyer
Question 32. The f-block elements are called as _______ .
Representative elements
Transition elements
Noble gases
Inner transition elements
Question 33. The Law of Octaves was applicable only upto element ________.
Calcium
Zinc
Copper
Sodium
Question 34. What are the main features of Mendeleev’s Periodic Table?
Question 35
(i)How many elements are present in- third period , (ii) Sixth period
What were the limitations of Dobereiner's classification of elements?
