CHAPTER # 3: MOTION AND FORCE 1. A body covering equal displacement in equal interval of time possesses: a) Var...
CHAPTER # 3: MOTION AND FORCE
1.
A body
covering equal displacement in equal interval of time possesses:
a) Variable velocity
b) Uniform acceleration
c) Uniform velocity
d) None of above
2.
Instantaneous
and average velocities become equal when body:
a) Has zero acceleration
b) Has uniform velocity
c) Has variable velocity
d) Moves in a circle
3.
When
velocity time graph is a straight line parallel to time axis then:
a) Acceleration is const
b) Acceleration is variable
c) Acceleration is zero
d) Velocity is zero
4.
Slope of
velocity time graph is:
a) Acceleration
b) Distance
c) Force
d) Momentum
5.
The area
between the velocity-time graph and the time axis is numerically equal to:
a) Velocity
b) Distance
c) Time
d) Acceleration
6.
If the
slop of velocity-time graph gradually decreases, then the body is said to be moving with:
a) Positive acceleration
b) Negative acceleration
c) Uniform velocity
d) Variable velocity
7.
If the
slop of velocity-time graph gradually increases, then the body is said to be
moving with:
a) Positive acceleration
b) Negative acceleration
c)
Uniform
velocity
d) Variable velocity
8.
What is
the shape of velocity time graph for constant acceleration?
a) Straight line
b) Parabola
c) Inclined curve
d) Declined curve
9.
When the
object is moving towards earth, the value of “g” is taken as:
a) Positive
b) Negative
c) Zero
d) None
10. Change in momentum is called:
a) Force
b) Impulse
c) Acceleration
d) Torque
11.
The time
rate of change of momentum is called:
a) Force
b) Impulse
c) Acceleration
d) Torque
12.
The
property of a body due to which it opposes its state of rest or uniform motion
is called:
a) Momentum
b) Inertia
c) Torque
d) Weight
13.
Which law
of motion is also called law of inertia?
a) 1st law
b) 2nd law
c) 3rd law
d) 4th law
14.
Inertia
of an object is quantitative measure of its:
a) Volume
b) Density
c)
Mass
d) Temperature
1
15. Momentum depends upon.
a) Force act on the body
b) Mass of the body
c) Velocity of the body
d) Both mass and velocity of the body
16.
An
alternate unit to−1 is:
a)
Js
b) Ns
c) Nm
d) N
17. SI unit of impulse is:
a)
−2
b)
c)
d)
None of
these
18. The dimension of acceleration is.
a)
−1
b)
2 −2
c)
2 2
d)
−2
19. The dimension of force is.
a)
−2
b)
2 −2
c)
2 2
d) −2 −2
20.
Which of
the following pair has same direction always?
a) Force, displacement
b) Force, velocity
c) Force, acceleration
d) Force, momentum
21.
A snooker
ball moving with velocity v collides
head on with another snooker ball of same mass
at rest. If the collision is elastic, the velocity of the second snooker ball
is:
a) Zero
b) Infinity
c) V
d) 2V
22. Taking off rocket can be explained by.
a)
1st law of motion
b)
2nd law of motion
c)
Law of
conservation of momentum
d) Law of conservation of energy
23. The trajectory (or path) of a projectile is.
a) Straight line
b) Parabola
c) Hyperbola
d) Circle
24.
A
football player will throw a football at maximum distance if the angle of
projection is:
a)
300
b)
450
c)
600
d)
900
25.
Range of
a projectile on a horizontal plane is same for the following pair of angles:
a)
300 and 600
b)
200 and 800
c)
00 and 450
d) 100 and 900
26. The total time of flight of projectile is given by:
a)
|
sin
|
|
b)
|
2 sin
|
|
c)
|
sin
|
|
2
|
||
d)
2 sin2
27. Horizontal range of the projectile is given by
2 2 sin2
|
||||
the expression
|
=
|
. For
|
||
what value of , range is maximum:
a)
00
b)
300
c)
450
d)
900
28.
The
velocity of projectile at its maximum height is:
a)
sin
b)
cos
c)
Maximum
d) Zero
2
29. Motion of projectile is _____________
dimensional.
a) One
b) Two
c) Three
d) Four
30. A projectile is thrown upward
with initial velocity making an
angle with the horizontal. The maximum horizontal range is given by:
a) 2
2
|
||
b)
|
||
2
|
||
2 sin2
|
||
c)
|
||
2 sin2
|
||
d)
|
2
|
|
31.
During
projectile motion, the horizontal component of velocity:
a) Changes with time
b) Becomes zero
c) Remains constant
d) Increases with time
32.
The range
of projectile is same for angles of projection:
a)
30° and 45°
b)
45° and 60°
c)
50° and 45°
d)
30° and 60°
Q. No.
|
Ans.
|
Q. No.
|
Ans.
|
1
|
c
|
17
|
b
|
2
|
b
|
18
|
d
|
3
|
c
|
19
|
a
|
4
|
a
|
20
|
c
|
5
|
b
|
21
|
c
|
6
|
b
|
22
|
c
|
7
|
a
|
23
|
b
|
8
|
a
|
24
|
b
|
9
|
a
|
25
|
a
|
10
|
b
|
26
|
b
|
11
|
a
|
27
|
c
|
12
|
b
|
28
|
b
|
13
|
a
|
29
|
b
|
14
|
c
|
30
|
a
|
15
|
d
|
31
|
c
|
16
|
b
|
32
|
d
|
COMMENTS