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CBSE

NEET Physics : Motion in A Plane

Multiple Choice Questions

41.

The angular velocity of second hand clock, of a clock is

$(\frac{π}{6}) rad s^{- 1}$
$(\frac{π}{60}) rad s^{- 1}$
$(\frac{π}{30}) rad s^{- 1}$
$(\frac{π}{15}) rad s^{- 1}$

42.

A stick of length L and mass M lies on a frictionless horizontal surface on which it is free to move in any way. A ball of mass m moving with speed V collides elastically with the stick as shown in fig below. If after the collision, the ball comes to rest, then what should be the mass of the ball?

m = 2M
m = M
m= M/2
m = M/A

43.

If a vector $2 \hat{i} + 3 \hat{j} + 8 \hat{k}$ is perpendicular to the vector $4 \hat{j} - 4 \hat{i} + α \hat{k}$ , then the value of α is

-1
$\frac{1}{2}$
$- \frac{1}{2}$
1

44.

Under the influence of a uniform magnetic field a charged particle is moving in a circle of radius R with constant speed v. The time period of the motion

depends on v and not on R
depends on both R and v
is independent of both R and v
depends on R and not on v

45.

A man is at height of 100 m. he sees a car which makes an angle of $\frac{π}{6}$ with man's position. If the car moves to a point where angle is $\frac{π}{3}$ what is the distance moved by it?

$(\frac{100}{\sqrt{3}}) m$
$(200 \sqrt{3}) m$
$(\frac{200}{\sqrt{3}}) m$
$(\frac{150}{\sqrt{3}}) m$

46.

A projectile is thrown in the upward direction making an angle of 60° with the horizontal direction with a velocity of 147 ms^-1 Then the time after which its inclination with the horizontal is 45°, is

15 s
10.98 s
5.49 s
2.745 s

47.

A wheel has angular acceleration of 3.0 rad/s² and an initial angular speed of 2.00 rad/s. In a time of 2 s it has rotated through an angle (in radian) of

48.

The x and y coordinates of a particle moving in a plane are given be x(t) = acos(pt) and y(t) = bsin(pt) where a, b (<a) and p are positive constants of appropriate dimensions and t is time. Then , which of the following is not true?

The path of the particle is an ellipse
Velocity and acceleration of the particle are perpendicular to each other at t = π/2p
Acceleration of the particle is always directed towards a fixed point
Distance travelled by the particle in the time interval between t = 0 and t = π/2p is a

49.

A particle starting from the origin (0, 0) moves in a straight line in the (x, y) plane. Its coordinates at a later time are $(\sqrt{3}, 3)$ . The path of the particle makes with the x-axis an angle of

30^o
45^o
60^o
0^o

50.

The maximum range of a gun on horizontal terrain is 16 km if g=10m/s^2.What must be the muzzle velocity of the shell?

200 m/s
100 m/s
400 m/s
300 m/s

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NEET Physics : Motion in A Plane

Multiple Choice Questions