MOTION IN TWO DIMENSION
1. If a person can throw ball to a minimum height h (vertically) then the maximum distance
up to which they can throw the ball is
a) h
b) 2h
c) 3h
d) 4h
2. When a particle is thrown up, it will have
a) different speed at the same heights during ascent and during descent
b) same speed at the same heights during ascent and during descent
c) same speed at different heights during ascent and during descent
D) Different speed at different heights during ascent and during descent 4.
3. The path of a projectile is a
a) triangle
b) circle
c) ellipse
d) parabola
4. The horizontal range (R) of a projectile is maximum when projectile’s angle is
a) 90◦
b) 75◦
c) 60◦
d) 45◦
5. Planets move around the sun due to
a) centrifugal force
c) Gravitational pull b/w them
b) centripetal force
d) none of the above
6. A car sometimes overturns while taking a turn. When it overturns. It is
a) The inner wheel which leaves the ground first
b) the outer wheel which leaves the ground first
c) Both the wheel which leaves the ground simultaneously
d) Either wheel leaves the ground first
7. A bullet is dropped from the same height when another bullet is fired horizontally. They
will hit the ground
a) one after the other
c) Depends on the observer
b) Simultaneously
d) none of the above
8. A bomb is dropped from an aero plane moving horizontally at constant speed. When air
resistance is taken into consideration, the bomb
a) Falls to earth exactly below the aeroplane
b) Falls to earth behind the aeroplane
c) Falls to earth ahead of the aeroplane
d) files with the aeroplane
9. A man projects a coin upwards from the gate of uniformly moving train. The path of coin
for the man will be
a) parabolic
b) Inclined straight line
c) vertical straight line
d)
Horizontal straight line
10.
A particle in a plane with constant acceleration in a direction different from the
initial velocity. The path of the particle will b
a) A straight line
11.
b) An arc of a circle
c) A parabola
d) An ellipse
In the motion of a projectile freely under gravity, its
a) total energy is conserved
b) momentum is conserved
c) Energy and momentum both are conserved
d) none is conserved
12.
The range of a projectile for a given initial velocity is maximum when the angle
of projection is 45◦. The range will be minimum. if the angle of projection is
a) 90◦
b) 180◦
c) 60◦
d) 75◦
13.
A ball is thrown upwards and it returns to ground describing a parabola path.
Which of the following remains constant
a) kinetic Energy of the ball
b) speed of the ball
c) Horizontal components of velocity
d) Vertical components of velocity
14.
An object is thrown along a direction inclined at the angle of 45 with the
horizontal direction. The horizontal range 0f the particle is equal to
a) vertical height
c) Thrice the vertical height
b) Twice the vertical height
d) four times the vertical height
15.
Galileo writes that for angle of projection of a projectile at angles (45+θ) and (45θ), the horizontal ranges described by the projectile are in the ratio of (if θ≤45).
b) 2:1
b) 1:2
c) 1:1
d) 2:3
A projectile thrown with a speed v at an angle has a range R on the surface θ of
16.
earth. For same v and
a) R/6
. its range on the surface 0f moon will be
b) 6R
c) R/36
d) 36R
17.
The horiz0ntal range is four times the maximum height attained by a projectile.
The angle of projection is
a) 90◦
b) 60◦
c) 45◦
d) 30◦
18.
Two bodies are projected with the same velocity. If one is projected at an angle of
30◦ and the other at an angle of 60◦ to the horizontal, the ratio of the maximum heights
reached is
a) 3:1
b) 1:3
c) 1:2
d) 2:1
19.
At what point of a projectile motion acceleration and velocity are perpendicular to
each other
a) At the point of projection
b) At the point of drop
c) At the topmost point
d) Anywhere in b/w the point of projection and topmost point
A particle is revolving in a circle of radius r. It’s displacement after completing
half of the revolution will be:
a) π r
b) 2r
c) 2πr
d) r/2
20.
21. A circular disc start slipping without rolling down an inclined plane then its velocity
will be:
a) g h
c) √gh
b) 2gh
d) √2gh
22. If a particle moves in a circle describing equal angles in equal times, its velocity vector
a) Remains constant
c) Changes in direction
b) changes in magnitude
d) changes both in magnitude and direction
23. If the over bridge is concave instead of being concave, the thrust on the road at the lowest
position will be
a) mg+mv2/r
b) mg_mv2/r
c) m2v2g/r
d) v2g/r
24. A particle revolves round a circular path. The acceleration of the particle is
a) Along the circumference
b) Along the tangent
c) Along the radius
d) Zero
25. A cyclist turns around a curve at 15 miles/hour. If he turns at double the speed, the
tendency to overturn is
a.
b.
c.
d.
Doubled
Quadrupled
Halved
Unchanged
26. A body moves with a constant speed in a circular path is moving in a circular path with
a constant speed. It has
a.
b.
c.
d.
Acceleration of constant magnitude
Constant velocity
Constant acceleration
An acceleration which varies with time
27. A motorcyclist going with a constant speed in a circular track has
a.
b.
c.
d.
Linear velocity is constant
Constant acceleration
Angular velocity is constant
Constant force
28. What could be the reason a car moving on a horizontal road gets thrown out of the road
while taking a turn
a.
b.
c.
d.
Due to the reaction of the ground
Due to rolling frictional force between tyre and road
By the gravitational force
Due to lack of sufficient centripetal force
29. A stone tied to a string is rotated in a circle. If the string is cut, the stone flies away from
the circle because
a.
b.
c.
d.
A centrifugal force acts on the stone
Of its inertia
A centripetal force acts on the stone
The reaction of the centripetal force
30. A tachometer is a device to measure
a.
b.
c.
d.
Gravitational pull
Speed of rotation
Surface tension
Tension in a spring