1
###
Which is an example of the force of gravity of the earth

Which one of the following is an example of the force of gravity of the earth acting on a vibrating pendulum bob?

- Applied force
- Frictional force
- Restoring force
- Virtual force

2
###
Which one of the following has maximum inertia

Which one of the following has maximum inertia?

- An atom
- A molecule
- A one-rupee coin
- A cricket ball

3
###
An object is moving, with uniform acceleration a

An object is moving, with uniform acceleration a. Its initial velocity is u and after time t its velocity is v. The equation of its motion is v = u + at. The velocity (along y-axis) time (along x-axis) graph shall be a straight line

- passing through origin
- with x-intercept u
- with y-intercept u
- with slope u

4
###
If an object moves with constant velocity then

If an object moves with constant velocity then which one of the following statements is not correct?

- Its motion is along a straight line
- Its speed changes with time
- Its acceleration is zero
- Its displacement increases linearly with time

5
###
If T is the time period of an oscillating pendulum

If T is the time period of an oscillating pendulum, which one the following statements is not correct?

- The motion repeats after time T only once
- T is the least time after which motion repeats itself
- The motion repeats itself after nT, where n is a positive integer
- T remains the same only for small angular displacements

6
###
If the motion of an object is represented by a straight line

If the motion of an object is represented by a straight line parallel to the time axis in a distance-time graph, then the object undergoes

- decelerated motion
- uniform non-zero velocity motion
- accelerated motion
- zero velocity motion

7
###
A force applied on a body is represented as

A force applied on a body is represented as

**F** = 6**i** - 8**j** + 10**k**

and accelerates is at 1 m/s^{2}. The mass of the body is

- 10√2 kg
- 2√10 kg
- 8 kg
- 10 kg

8
###
A passenger in a moving train tosses a coin upward which falls behind him

A passenger in a moving train tosses a coin upward which falls behind him. It implies that the motion of the train is

- uniform
- retarded
- accelerated
- along the circular tracks

9
###
A motor vehicle is moving on a circle with uniform speed

A motor vehicle is moving on a circle with uniform speed. The net acceleration of the vehicle is

- perpendicular to the radius and along the velocity
- towards the centre of circle
- away from the centre along the radius of the circle
- zero

10
###
If the distance S covered by a moving car in rectilinear motion

If the distance S covered by a moving car in rectilinear motion with a speed v in time t is given by S = vt, then the car undergoes

- uniform velocity
- uniform acceleration
- non-uniform acceleration
- non-uniform velocity

11
###
A bullet is fired vertically up from a 400 m tall tower with a speed

A bullet is fired vertically up from a 400 m tall tower with a speed 80 m/s. If g is taken as 10 m/s^{2}, the time taken by the bullet to reach the ground will be

- 24 s
- 20 s
- 16 s
- 8 s

12
###
Newton's law of motion cannot be applicable to the particles

Newton's law of motion cannot be applicable to the particles moving at a speed comparable to the speed of

- light
- sound
- rocket
- bullet train

13
###
Automobiles are fitted with a device that shows the distance travelled

Automobiles are fitted with a device that shows the distance travelled. Such a device is known as

- Speedometer
- Cathetometer
- Odometer
- Lactometer

14
###
The speed of a car travelling on a straight road

The speed of a car travelling on a straight road is listed below at successive intervals of 1 s:

Time (s) 0 1 2 3 4

Speed (m/s) 0 2 4 6 8

Which of the following is/are correct?

The car travels

- with a uniform acceleration of 2 m/s
^{2}. - 16 m in 4 s.
- with an average speed of 4 m/s.

Select the correct answer using the code given below:

- 1, 2 and 3
- 2 and 3 only
- 1 and 2 only
- 1 only

15
###
In a vacuum, a five-rupee coin, a feather of a sparrow bird and a mango are dropped

In a vacuum, a five-rupee coin, a feather of a sparrow bird and a mango are dropped simultaneously from the same height. The time taken by them to reach the bottom is t_{1}, t_{2} and t_{3} respectively. In this situation, we will observe that

- t
_{1}> t_{2}> t_{3} - t
_{1}> t_{3}> t_{2} - t
_{3}> t_{1}> t_{2} - t
_{1}= t_{2}= t_{3}

16
###
An object moves in a circular path with a constant speed

An object moves in a circular path with a constant speed. Which one of the following statements is correct?

- The centripetal acceleration of the object is smaller for a gentle curve (i.e., curve of larger radius) than that for a sharp curve (i.e., curve of smaller radius).
- The centripetal acceleration is greater for a gentle curve than that for a sharp curve.
- The centripetal acceleration is the same for both, the gentle and sharp curves.
- The centripetal acceleration causes the object to slow down.

17
###
Rocket works on the principle of conservation of

Rocket works on the principle of conservation of

- mass
- energy
- momentum
- velocity

18
###
An object of mass 2 kg is sliding with a constant velocity of 4 m/s

An object of mass 2 kg is sliding with a constant velocity of 4 m s^{–1} on a frictionless horizontal table. The force required to keep the object moving with the same velocity is

- 32 N
- 0 N
- 2 N
- 8 N

19
###
A passenger in a moving train tosses a coin which falls behind him

A passenger in a moving train tosses a coin which falls behind him. It means that motion of the train is

- accelerated
- uniform
- retarded
- along circular tracks

20
###
The inertia of an object tends to cause the object

The inertia of an object tends to cause the object

- to increase its speed
- to decrease its speed
- to resist any change in its state of motion
- to decelerate due to friction

21
###
A goalkeeper in a game of football pulls his hands backwards after holding the ball

A goalkeeper in a game of football pulls his hands backwards after holding the ball shot at the goal. This enables the goal keeper to

- exert larger force on the ball
- reduce the force exerted by the ball on hands
- increase the rate of change of momentum
- decrease the rate of change of momentum

22
###
Slope of a velocity - time graph gives

Slope of a velocity – time graph gives

- the distance
- the displacement
- the acceleration
- the speed

23
###
Which figures represents uniform motion of a moving object

Which of the following figures represents uniform motion of a moving object correctly?

24
###
Suppose a boy is enjoying a ride on a merry-go-round

Suppose a boy is enjoying a ride on a merry-go-round which is moving with a constant speed of 10 m s^{–1}. It implies that the boy is

- at rest
- moving with no acceleration
- in accelerated motion
- moving with uniform velocity

25
###
From the given v–t graph, it can be inferred that the object is

From the given v – t graph, it can be inferred that the object is

- in uniform motion
- at rest
- in non-uniform motion
- moving with uniform acceleration

26
###
If the displacement of an object is proportional to square of time

If the displacement of an object is proportional to square of time, then the object moves with

- uniform velocity
- uniform acceleration
- increasing acceleration
- decreasing acceleration

27
###
A body is thrown vertically upward with velocity u

A body is thrown vertically upward with velocity u, the greatest height h to which it will rise is

- u/g
- u
^{2}/2g - u
^{2}/g - u/2g

28
###
To sharpen the blade of a knife by rubbing it against a surface

To sharpen the blade of a knife by rubbing it against a surface, which of the following will be most suitable?

- stone
- plastic block
- wooden block
- glass block

29
###
During dry weather, while combing hair, sometimes we experience hair flying apart

During dry weather, while combing hair, sometimes we experience hair flying apart. The force responsible for this is

- force of gravity
- electrostatic force
- force of friction
- magnetic force

30
###
A bus travels 54 km in 90 minutes. The speed of the bus is

A bus travels 54 km in 90 minutes. The speed of the bus is

- 0.6 m/s
- 10 m/s
- 5.4 m/s
- 3.6 m/s

- What is observed when a pinch of sodium hydrogen carbonate
- After examining a prepared slide under the high power
- List four steps of obtaining germinating dicot seeds
- List four precautions while preparing a temporary mount of a leaf peel
- The current flowing through a resistor connected in a circuit
- Describe Economic Hardships Faced By Europe In 1830s
- Describe the serious problem faced by the modern part of Hanoi
- How had the printing press created a new culture of reading in Europe