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OTI365 - NTSE - X Standard
NTSE SAT Physics - Motion Important Questions with Answer

NTSE SAT Physics - Motion

Exam Duration: 45 Mins Total Questions : 30

1 )

A ball is released freely from the top of a building of height h. How long will it take for the ball to come down if h=80 m, g= 10 m/s²

(a)
6 s
(b)
8 s
(c)
4 s
(d)
2 s

2 )

Odometer of automobiles records

(a)
average speed
(b)
Distance travelled
(c)
instantaneous speed
(d)
average acceleration

3 )

The ratio of SI units to CGS units of velocity is

(a)
10^-2
(b)
10²
(c)
10
(d)
10^-1

4 )

The distance (s) in metres travelled by a particle is related to time (t) in seconds by the equation of motion: S = 10t + 4t².What is the initial velocity of the body

(a)
10 m/s
(b)
6 m/s
(c)
4 m/s
(d)
10 m/s²

5 )

A body moving along a straight line at 20 m/s decelerates at the rate of 4 m/s². After 2 seconds its speed will be equal to:

(a)
8 m/s
(b)
12 m/s
(c)
16 m/s
(d)
-12 m/s

6 )

Speed of 90 km/h when expressed in m/s is:

(a)
2.5
(b)
25
(c)
250
(d)
90000

7 )

When a graph of one quantity versus another results in a straight line, the quantities are

(a)
Directly proportional
(b)
Constant
(c)
Inversely proportional
(d)
Independent of each other

8 )

The physical quantity describing motion and whose measure is the product of distance travelled and the time taken to travel that distance is _____

(a)
Speed
(b)
Mass
(c)
Weight
(d)
Displacement

9 )

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

(a)
at rest
(b)
moving with no acceleration
(c)
in accelerated motion
(d)
moving with uniform velocity

10 )

A displacement:

(a)
is always positive
(b)
is always negative
(c)
may be positive as well as negative
(d)
is neither positive nor negative

11 )

Time is an example of:

(a)
Scalar
(b)
Vector
(c)
Scalar or vector
(d)
Neither scalar nor vector

12 )

Unit of velocity is:

(a)
ms
(b)
ms^-1
(c)
ms²
(d)
none of these

13 )

Out of energy and acceleration which is vector?

(a)
Acceleration
(b)
Energy
(c)
Both
(d)
None of these

14 )

A car increase its speed from 20 kmh^-1 to 50 kmh^-1 is 10 sec, its acceleration is:

(a)
30 ms^-1
(b)
3 ms^-1
(c)
18 ms^-1
(d)
0.83 ms^-1

15 )

A body starts falling from height 'h' and travels distance hl2 during the last second of motion. The find of travel (in sec.) is:

(a)
√2-1
(b)
2+√2
(c)
√2+√3
(d)
√3+2

16 )

A car travels \(\frac{1}{3}\)rd distance on a straight road with a velocity of 10 km/hr, next \(\frac{1}{3}\)rd with velocity 20 km/hr and the last \(\frac{1}{3}\)rd with velocity 60 km/hr. What is the average velocity of the car in the whole journey?

(a)
4 km/hr
(b)
6 km/hr
(c)
12 km/hr
(d)
18 km/hr

17 )

The velocity of a body at any instant is 10 m/s. After 5 sec, velocity of the particle is 20 m/s. The velocity at 3 seconds before is

(a)
8 m/sec
(b)
4 m/sec
(c)
6 m/sec
(d)
7 m/sec

18 )

A body covers 200 em in the first 2 sec and 220 cm in next 4 sec. What is the velocity of the body at the end of 7th second?

(a)
40 cm/sec
(b)
20 cm/sec
(c)
10 cm/sec
(d)
5 cm/sec

19 )

A ball is dropped on the floor from a height of 10 m. It rebounds to a height of2.5 m. If the ball is in contact with the floor for 0.0 1 sec, then average acceleration during contact is:

(a)
2100 m/s²
(b)
1400 m/s²
(c)
700 m/s²
(d)
400 m/s²

20 )

The relationship between average speed, time and distance is

(a)
Average speed = distance time
(b)
Average speed =\(\frac{total\quad distance}{total\quad time}\)
(c)
Time = average speed/distance
(d)
Distance = average speed time

21 )

Which of the following statement is not correct for an object moving along a straight path in an accelerated motion?

(a)
Its speed keeps changing
(b)
Its velocity always changes
(c)
It always goes away from the earth
(d)
A force is always acting on it

22 )

When a running must be accelerates suddenly, the pillion rider has a tendency to fall fbackward. This is an example of:

(a)
Newton's first law of motion
(b)
Newton's second law of motion
(c)
Newton's third law of motion
(d)
Newton's law of gravitation of motion

23 )

A force F acts on a stationary body for the time 1. The distance covered by the body 'S' will be proportional to

(a)
t
(b)
\(\frac { I }{ t } \)
(c)
t²
(d)
\(\frac { 1 }{ { t }^{ 2 } } \)

24 )

A body P has mass 2 m and velocity 5v. Another body Q has mass 8 m and velocity 1.25 v. The ratio of momentum of P and Q is:

(a)
2:1
(b)
1:1
(c)
1:2
(d)
3:2

25 )

Two stones, A and B are thrown from the top of a tower. The stone A is thrown vertically upwards while the stone E is thrown vertically downwards with the same speed. Which of the following statements is true

(a)
B reaches the ground earlier than A
(b)
A reaches the ground earlier than B
(c)
A and B reach the ground together
(d)
None of these

26 )

A particle experiences constant acceleration for 20 s after starting from rest. If it travels a distance S₁ in the first 10 second and a distance S₂ in the next 10 second, then

(a)
S₂ = 2S₁
(b)
S₂=3S₁
(c)
S₂=4S₁
(d)
S₂=5S₁

27 )

A constant force acts perpendicular to the velocity of a particle, then

(a)
acceleration is constant
(b)
velocity is constant
(c)
momentum will be constant
(d)
kinetic energy is constant

28 )

In one second a particle goes from point A to point B is moving in a semicircle of radius 10m as shown in the figure. The magnitude of average velocity is

(a)
3.14 m/s
(b)
zero
(c)
2m/s
(d)
none

29 )

A boat can have a speed of 2km/hr in still water the minimum time taken by the boat to cross a river of width 0.5 km flowing with a speed of 40 km/hr is