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Kinematics-2D

384 Questions Start Objective Test
All Exams Allen Objective Errorless
RPMT 2005 Q176 Errorless Oblique Projectile Motion MCQ
A projectile fired with initial velocity u at some angle $\theta$ has a range R. If the initial velocity be doubled at the same angle of projection, then the range will be
A.
2R
B.
R/2
C.
R
D.
4R
RPMT 2005 Q177 Errorless Oblique Projectile Motion MCQ
If retardation produced by air resistance of projectile is one-tenth of acceleration due to gravity, the time to reach maximum height
A.
Decreases by 11 percent
B.
Increases by 11 percent
C.
Decreases by 9 percent
D.
Increases by 9 percent
DPMT 2005 Q178 Errorless Oblique Projectile Motion MCQ
Two bodies are thrown up at angles of $45^{\circ}$ and $60^{\circ}$ , respectively, with the horizontal. If both bodies attain same vertical height, then the ratio of velocities with which these are thrown is
A.
$\sqrt{\frac{2}{3}}$
B.
$\frac{2}{\sqrt{3}}$
C.
$\sqrt{\frac{3}{2}}$
D.
$\frac{\sqrt{3}}{2}$
Odisha JEE 2005 Q179 Errorless Oblique Projectile Motion MCQ
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.
Any where in between the point of projection and topmost point
AFMC 2005 Q180 Errorless Oblique Projectile Motion MCQ
The maximum horizontal range of a projectile is $400m$ . The maximum value of height attained by it will be
A.
$100m$
B.
$200m$
C.
$400m$
D.
$800m$
Kerala PMT 2004 Q181 Errorless Uniform Circular Motion MCQ
Two particles of equal masses are revolving in circular paths of radii $r_1$ and $r_2$ respectively with the same speed. The ratio of their centripetal forces is
A.
$\frac{r_2}{r_1}$
B.
$\sqrt{\frac{r_2}{r_1}}$
C.
$\left(\frac{r_1}{r_2}\right)^2$
D.
$\left(\frac{r_2}{r_1}\right)^2$
KCET 2004 Q182 Errorless Uniform Circular Motion MCQ
When a body moves in a circular path, no work is done by the force since,
A.
There is no displacement
B.
There is no net force
C.
Force and displacement are perpendicular to each other
D.
The force is always away from the centre
AIEEE 2004 Q183 Errorless Uniform Circular Motion MCQ
Which of the following statements is false for a particle moving in a circle with a constant angular speed
A.
The velocity vector is tangent to the circle
B.
The acceleration vector is tangent to the circle
C.
The acceleration vector points to the centre of the circle
D.
The velocity and acceleration vectors are perpendicular to each other
DCE 2004 Q184 Errorless Uniform Circular Motion MCQ
An object is moving in a circle of radius 100 m with a constant speed of 31.4 m/s. What is its average speed for one complete revolution
A.
Zero
B.
31.4 m/s
C.
3.14 m/s
D.
$\sqrt{2} \times 31.4$ m/s
CPMT 2004; RPMT 2006 Q185 Errorless Uniform Circular Motion MCQ
If $a_r$ and $a_t$ represent radial and tangential accelerations, the motion of a particle will be uniformly circular if
A.
$a_r = 0$ and $a_t = 0$
B.
$a_r = 0$ but $a_t \neq 0$
C.
$a_r \neq 0$ but $a_t = 0$
D.
$a_r \neq 0$ and $a_t \neq 0$
DPMT 2004 Q186 Errorless Non-uniform Circular Motion MCQ
Figure shows a body of mass $m$ moving with a uniform speed $v$ along a circle of radius $r$ . The change in velocity in going from $A$ to $B$ is
A.
$v \sqrt {2}$
B.
$v / \sqrt {2}$
C.
v
D.
Zero
MP PMT 2004 Q187 Errorless Horizontal Projectile Motion MCQ
A particle moves in a plane with constant acceleration in a direction different from the initial velocity. The path of the particle will be
A.
A straight line
B.
An arc of a circle
C.
A parabola
D.
An ellipse
BCECE 2004 Q188 Errorless Horizontal Projectile Motion MCQ
At the height 80 m, an aeroplane is moving with 150 m/s. A bomb is dropped from it so as to hit a target. At what distance from the target should the bomb be dropped (Given $g = 10 \, m/s^{2}$ )
A.
605.3 m
B.
600 m
C.
80 m
D.
230 m
MP PMT 2004 Q189 Errorless Oblique Projectile Motion MCQ
A ball is projected with velocity $V_{o}$ at an angle of elevation 30Ā°. Mark the correct statement
A.
Kinetic energy will be zero at the highest point of the trajectory
B.
Vertical component of momentum will be conserved
C.
Horizontal component of momentum will be conserved
D.
Gravitational potential energy will be minimum at the highest point of the trajectory
J & K CET 2004 Q190 Errorless Oblique Projectile Motion MCQ
Neglecting the air resistance, the time of flight of a projectile is determined by
A.
$U_{\text{vertical}}$
B.
$U_{\text{horizontal}}$
C.
$U = U^{2}_{\text{vertical}} + U^{2}_{\text{horizontal}}$
D.
$U = U(U^{2}_{\text{vertical}} + U^{2}_{\text{horizontal}})^{1/2}$
AIEEE 2004 Q191 Errorless Oblique Projectile Motion MCQ
A ball is thrown from a point with a speed $v_{o}$ at an angle of projection $\theta$ . From the same point and at the same instant a person starts running with a constant speed $v_{o} / 2$ to catch the ball. Will the person be able to catch the ball? If yes, what should be the angle of projection
A.
Yes, $60^{\circ}$
B.
Yes, $30^{\circ}$
C.
No
D.
Yes, $45^{\circ}$
BCECE 2004 Q192 Errorless Oblique Projectile Motion MCQ
A stone is thrown at an angle $\theta$ to the horizontal reaches a maximum height $H$ . Then the time of flight of stone will be
A.
$\sqrt{\frac{2H}{g}}$
B.
$2\sqrt{\frac{2H}{g}}$
C.
$\frac{2\sqrt{2H\sin\theta}}{g}$
D.
$\frac{\sqrt{2H\sin\theta}}{g}$
DPMT 2004 Q193 Errorless Oblique Projectile Motion MCQ
A ball is projected upwards from the top of tower with a velocity $50 \, ms^{-1}$ making an angle $30^{\circ}$ with the horizontal. The height of tower is 70 m. After how many seconds from the instant of throwing will the ball reach the ground
A.
2 s
B.
5 s
C.
7 s
D.
9 s
MP PET 2003, 13 Q194 Errorless Uniform Circular Motion MCQ
A body of mass $m$ moves in a circular path with uniform angular velocity. The motion of the body has constant
A.
Acceleration
B.
Velocity
C.
Momentum
D.
Kinetic energy
UPSEAT 2003 Q195 Errorless Uniform Circular Motion MCQ
Three identical particles are joined together by a thread as shown in figure. All the three particles are moving in a horizontal plane. If the velocity of the outermost particle is $v_{0}$ , then the ratio of tensions in the three sections of the string is
A.
3:5:7
B.
3:4:5
C.
7:11:6
D.
3:5:6
MP PMT 2003 Q196 Errorless Uniform Circular Motion MCQ
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 wheels leave the ground simultaneously
D.
Either wheel leaves the ground first
RPET 2003 Q197 Errorless Uniform Circular Motion MCQ
A particle is moving on a circular path with constant speed, then its acceleration will be
A.
Zero
B.
External radial acceleration
C.
Internal radial acceleration
D.
Constant acceleration
MP PMT 2003 Q198 Errorless Uniform Circular Motion MCQ
The length of second's hand in a watch is 1 cm. The change in velocity of its tip in 15 seconds is
A.
Zero
B.
$\frac{\pi}{30\sqrt{2}}$ cm/sec
C.
$\frac{\pi}{30}$ cm/sec
D.
$\frac{\pi\sqrt{2}}{30}$ cm/sec
AFMC 2003 Q199 Errorless Uniform Circular Motion MCQ
The force required to keep a body in uniform circular motion is
A.
Centripetal force
B.
Centrifugal force
C.
Resistance
D.
None of the above
Pb. PET 2003; MP PET 2010 Q200 Errorless Uniform Circular Motion MCQ
The acceleration of a train travelling with speed of 400 m/s as it goes round a curve of radius 160 m, is
A.
$1 \, km/s^{2}$
B.
$100 \, m/s^{2}$
C.
$10 \, m/s^{2}$
D.
$1 \, m/s^{2}$