NEET Physics Motion in a Plane with Constant Acceleration and Projectile Motion MCQs Set A

a)

b)

c)

d)

Answer:

Question:

a) 4 m s^–2 along x-direction

b) 2 m s^–2 along z-direction

c) 3 m s^–2 along x-direction

d) 4 m s^–2 along y-direction

Answer:  4 m s^–2 along x-direction

Question:

a)

b)

c)

d)

Answer:

Question:

a)

b) 8.5 units

c) 7 units

d) 10 units

Answer:

Question:  A particle moves in the X-Y plane with a constant acceleration 1.5 m/s² in the direction making an angle of 37° with the X-axis. At t = 0 the particle is at the origin and its velocity is 8.0 m/s along the X-axis. Find the position of the particle at t = 4.0 s.

a) (41.6m, 7.2 m)

b) (60.2 m, 8.2 m)

c) (50.3 m, 8.2 m)

d) (11.2 m, 8 m)

Answer: (41.6m, 7.2 m)

Question:

a) y² = x² + C

b) y² = x + C

c) xy = C

d) None of these

Answer: y² = x² + C

Question:  The coordinates of a particle moving in x–y plane at any instant of time t are x = 4t²; y = 3t². The speed of the particle at that instant is

a) 10 t

b) 5 t

c) 3 t

d) 2 t

Answer: 10 t

Question:  For motion in two or three dimensions, the angle between velocity and acceleration is

a) Any angle between 0° & 180°

b) 180°

c) 90°

d) 0°

Answer:  Any angle between 0° & 180°

Question:  A particle moves in a plane with a constant acceleration in a direction different from the initial velocity. The path of the particle is a/an

a) parabola

b) straight line

c) arc of a circle

d) ellipse

Answer: parabola

Question: The shape of trajectory of the motion of an object is determined by

a) All of these

b) initial position

c) acceleration

d) initial velocity

Answer: All of these

Question: If t_m is the time taken by a projectile to achieve the maximum height, then the total time of flight T_f related to t_m as

a) T_f = 2t_m

b) t_m = 2 T_f

c) None of these

d) Both

Answer: T_f = 2t_m

Question:  If u is the initial velocity of a projectile and v is the velocity at any instant, then the maximum horizontal range R_m is equal to

a)

b)

c)

d)

Answer:

Question:  In the projectile motion, if air resistance is ignored, the horizontal motion is at

a) constant velocity

b) constant retardation

c) constant acceleration

d) variable acceleration

Answer: constant velocity

Question: A bullet is dropped from the same height when another bullet is fired horizontally. They will hit the ground

a) simultaneously

b) one after the other

c) depends on the observer

d) None of these

Answer: simultaneously

Question: The time of flight of a projectile on an upward inclined plane depends upon

a) all of the above.

b) the value of acceleration due to gravity

c) angle of projection

d) angle of inclination of the plane

Answer: all of the above.

Question: At the highest point on the trajectory of a projectile, its

a) velocity is minimum

b) acceleration is maximum

c) velocity is maximum

d) acceleration is minimum

Answer: velocity is minimum

Question:  In a projectile motion, velocity at maximum height is

a)

b)

c)

d) None of these

Answer:

Question:  For angle ...X..., the projectile has maximum range and it is equal to ...X.... Here, X and Y refer to

a)

b)

c)

d)

Answer:

Question:  At the top of the trajectory of a projectile, the acceleration is

a) constant (g)

b) minimum

c) maximum

d) zero

Answer:  constant (g)

Question:

a)

b)

c)

d)

Answer:

Question:

a)

b)

c)

d) Two bodies can't collide

Answer:

Question:  A ball is thrown at an angle 75° with the horizontal at a speed of 20 m/s towards a high wall at a distance d. If the ball strikes the wall, its horizontal velocity component reverses the direction without change in magnitude and the vertical velocity component remains same. Ball stops  after hitting the ground. Match the statement of column I with the distance of the wall from the point of throw in column II.

a)

b)

c)

d)

Answer:

Question:

a)

b)

c)

d)

Answer:

Question:  A body is projected from the ground with a velocity 50 m/s at an angle of 30°. It crosses a wall after 3 sec. How far beyond the wall the stone will strike the ground? [take g = 10 m/s²]

a) 86.6 m

b) 100.1 m

c) 96.2 m

d) 111.1 m

Answer: 86.6 m

Question:  A stone is projected horizontally with a 5 m/s from the top of a plane inclined at an angle 45o with the horizontal. How far from the point of projection will the particle strike the plane?

a)

b)

c)

d)

Answer:

Question:

a) Assertion is correct, reason is correct; reason is a correct explanation for assertion

b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion

c) Assertion is correct, reason is incorrect

d) Assertion is incorrect, reason is correct.

Answer: Assertion is correct, reason is correct; reason is a correct explanation for assertion

Question:  A stone is projected horizontally with velocity u from a height H. It’s time of flight is:

a)

b)

c)

d)

Answer:

Question:  A body is projected horizontally with velocity 3 m/s from a height 5m. It’s horizontal range is

a) 3 m

b) 5 m

c) 10 m

d) 12 m

Answer: 3 m

Question: Two bullets are fired horizontally with different velocities from the same height. Which will reach the ground first?

a) Both will reach simultaneously

b) It cannot be predicted

c) Faster one

d) Slower one

Answer:  Both will reach simultaneously

Question:

a)

b)

c)

d)

Answer:

Question:  A body is thrown with a velocity of 9.8 ms^–1 making an angle of 30º with the horizontal. It will hit the ground after a time

a) 1 s

b) 1.5 s

c) 2.0 s

d) 3.0 s

Answer: 1 s

Question: The velocity of projection of a body is increased by 2%. Other factors remaining unchanged, what will be the percentage change in the maximum height attained?

a) 4 %

b) 8 %

c) 2 %

d) 1%

Answer: 4 %

Question:  A cricket ball is hit with a velocity 25 ms^–1, 60° above the horizontal. How far above the ground, ball passes over a fielder 50 m from the bat (consider the ball is struck very close to the ground)?

a) 5 m

b) 10 m

c) 7 m

d) 6.8 m

Answer: 5 m

Question:  A missile is fired for maximum range with an initial velocity of 20 m/s. If g = 10 m/s², the range of the missile is

a) 40 m

b) 50 m

c) 60 m

d) 20 m

Answer:  40 m

Question:

a) 60°

b) 45°

c) 30°

d) 75°

Answer: 60°

Question:  A projectilel can have the same range R for two angles of projection. If t₁ and t₂ be the times of flight in two cases, then what is the product of two times of flight?

a)

b)

c)

d)

Answer:

Question:

a)

b)

c)

d) zero

Answer:

Question:  Two pegs A and B thrown with speeds in the ratio 1 : 3 acquired the same heights. If A is thrown at an angle of 30° with the horizontal, the angle of projection of B will be

a)

b)

c)

d) 0°

Answer:

Question: A body projected at an angle with the horizontal has a range 300 m. If the time of flight is 6 s, then the horizontal component of velocity is

a) 50 m s^–1

b) 45 m s^–1

c) 30 m s^–1

d) 40 m s^–1

Answer:  50 m s^–1

Question:

a)

b)

c)

d)

Answer:

Question:  The greatest range of a particle, projected with a given velocity on an inclined plane, is x times the greatest vertical altitude above the inclined plane. Find the value of x.

a) 4

b) 3

c) 1/2

d) 2

Answer: 4

Question: A body is projected vertically upwards with a velocity u, after time t another body is projected vertically upwards from the same point with a velocity v, where v < u. If they meet as soon as possible, then choose the correct option

a)

b)

c)

d)

Answer:

Question:  The range of a projectile is R when the angle of projection is 40°. For the same velocity of projection and range, the other possible angle of projection is

a) 50°

b) 60°

c) 40°

d) 45°

Answer:  50°

Question:  If the angles of projection of a projectile with same initial velocity exceed or fall short of 45° by equal amounts , then the ratio of horizontal ranges is

a) 1 : 1

b) 1 : 4

c) 1 : 3

d) 1 : 2

Answer:  1 : 1

Question:

a)

b)

c)

d) zero

Answer:

Question:  A plane flying horizontally at a height of 1500 m with a velocity of 200 ms^–1 passes directly overhead on antiaircraft gun. Then the angle with the horizontal at which the gun should be fired from the shell with a muzzle velocity of 400 ms^–1 to hit the plane, is 

a) 60°

b) 30°

c) 45°

d) 90°

Answer:  60°

Question:

a)

b)

c)

d)

Answer:

Question:  A stone is just released from the window of a moving train moving along a horizontal straight track. The stone will hit the ground following a

a) parabolic path

b) straight line path

c) circular path

d) hyperbolic path

Answer: parabolic path

Question: A ball is thrown from rear end of the compartment of train to the front end which is moving at a constant horizontal velocity. An observer A sitting in the compartment and another observer B standing on the ground draw the trajectory. They will have

a) equal vertical ranges but different horizontal ranges

b) different vertical ranges but equal horizontal ranges

c) different vertical and different horizontal ranges

d) equal horizontal and equal vertical ranges

Answer: equal vertical ranges but different horizontal ranges

Question:

a) vertical straight line

b) straight line making 45° with the vertical

c) horizontal straight line

d) parabola

Answer: vertical straight line

Question: A bullet is fired with a speed of 1500 m/s in order to hit a target 100 m away. If g = 10 m/s². The gun should be aimed

a) 2.2 cm above the target

b) directly towards the target

c) 10 cm above the target

d) 15 cm above the target

Answer: 2.2 cm above the target

Question: 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

a) 5.49 s

b) 2.745 s

c) 10.98 s

d) 15 s

Answer: 5.49 s

Question:  A particle is projected with a velocity v such that its range on the horizontal plane is twice the greatest height attained by it. The range of the projectile is (where g is acceleration due to gravity)

a)

b)

c)

d)

Answer:

Question:

a) 3.5

b) 5.9

c) 16.3

d) 110.8

Answer: 3.5

Question:  Two bullets are fired horizontally with different velocities from the same height. Which will reach the ground first?

a) Both will reach simultaneously

b) It cannot be predicted

c) Faster one

d) None of these

Answer:  Both will reach simultaneously