Tiêu đề NEET - 05 - 2024.pdf ✅

PHYSICS SECTION - A Attempt All 35 Questions (1.) A body is projected vertically in upward direction from ground with speed 20 m / s . It will come on ground after ( ) 2 g 10 m / s = : (1) 2sec (2) 4sec (3) 20sec (4) 12sec (2.) A car travelling at a speed of 30 km / h is brought to a halt in a distance of 8 m by applying brakes. If the same car is moving at a speed of 60 km / hr then it can be brought to a halt with same brakes in: (1) 64 m (2) 32 m (3) 16 m (4) 4 m (3.) A particle experiences constant acceleration for 20 seconds after starting from rest. if it travels a distance 1 S in the first 10 seconds and a distance 2 S in next 10 seconds, then: (1) S S 2 1 = (2) 2 1 S 2 S = (3) 2 1 S 3 S = (4) 2 1 S 4 S = (4.) In figure, displacement-time (x-t) graph given below : the average velocity between time t = 5 s and t = 7 s is : (1) 1 8 ms− (2) 1 10 ms− (3) 1 15 ms− (4) 1 20 ms− (5.) A particle is thrown upwards, then correct v-t graph will be :
(1) (2) (3) (4) (6.) A particle of unit mass undergoes one-dimensional motion such that its velocity varies according to ( ) −2n v x x = β , where β and n are constants and x is the position of the particle. The acceleration of the particle as a function of x is given by : (1) 2 2 1 2n n  x − − − (2) 2 4 1 2 n n x  − − − (3) 2 2 1 2 n  x − + − (4) 2 4 1 2 n  x − + − (7.) The motion of a particle along a straight line is described by equation 3 x t t = + − 8 12 where, x is in metre and t in sec. The retardation of the particle when its velocity becomes zero, is: (1) 2 24 ms− (2) zero (3) 2 6 ms− (4) 2 12 ms− . (8.) A car moves with uniform acceleration upto some distance. Initial and final velocities are u and v then velocity of car at half way of the path will be: (1) ( ) 1 2 u v + (2) ( ) 1 2 2 2 u v + (3) ( ) 1 2 2 2 u v + (4) ( ) 1 2 2 2 u v +
(9.) The displacement of particle after time (t) is given by ( ) 3 2 x t t t = − + + 6 3 4 metre. What is the velocity of the particle when its acceleration is zero: (1) −12 m / s (2) −9 m / s (3) −6 m / s (4) −3 m / s (10.) Planck constant has the same dimensions as (1) force  time (2) force  distance (3) force  speed (4) force  distance  time (11.) A body released from the top of a smooth inclined plane and reaches the bottom of the plane in 4 sec. The time taken by the body to cover the first half of the inclined plane is : (1) 2sec (2) 2 2sec (3) 3 2sec (4) 5sec (12.) Which one of the following is a fundamental unit: (1) joule (2) watt (3) kilogram (4) netwon (13.) Addition of 3.72 and 9.4 to correct significant figures give: (1) 13.22 (2) 13.1 (3) 12.21601 (4) 13.214 (14.) The velocity of a particle is given by the expression ( ) 2 v x x x = − 3 4 where, x is distance covered by the particle. The expression for acceleration is : (1) ( )( ) 2 3 4 6 4 x x x − − (2) ( ) 2 6 3 4 x x − (3) 2 (6 4) x − (4) ( ) 2 3 4 6 x x x − (15.) A balloon is rising vertically up with a velocity of 29 m / s . A stone is dropped from it & it reaches the ground in 10sec . Find height of balloon when the stone was dropped. ( ) 2 g 10 m / s = : (1) 210 m (2) 440 m (3) 180 m (4) 325 m