Kinematics

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Kinematics — solved practice questions

8 NEET Physics questions with step-by-step solutions. Attempt each, then reveal the answer.

1. Q1easy

   A ball is thrown vertically upward with an initial speed of 20 m/s. Taking g = 10 m/s^2, the time taken to reach the highest point is:

   • A1 s
   • B2 s
   • C3 s
   • D4 s
   Show answer & solution

   Correct answer: (B) 2 s

   At the highest point v = 0. Using v = u − gt, 0 = 20 − 10t, so t = 2 s.

2. Q2easy

   A body starting from rest moves with uniform acceleration and covers 40 m in 4 s. Its acceleration is:

   • A2.5 m/s^2
   • B4 m/s^2
   • C5 m/s^2
   • D10 m/s^2
   Show answer & solution

   Correct answer: (C) 5 m/s^2

   Using s = ut + (1/2)at^2 with u = 0: 40 = (1/2)a(4)^2 = 8a, so a = 5 m/s^2.

3. Q3easy

   A stone is dropped from rest from the top of a tower and reaches the ground in 3 s. Taking g = 10 m/s^2, the height of the tower is:

   • A15 m
   • B30 m
   • C40 m
   • D45 m
   Show answer & solution

   Correct answer: (D) 45 m

   With u = 0, h = (1/2)gt^2 = (1/2)(10)(3)^2 = 45 m.

4. Q4medium

   A car moving at 20 m/s is brought to rest with uniform deceleration in 5 s. The distance travelled before stopping is:

   • A50 m
   • B75 m
   • C100 m
   • D40 m
   Show answer & solution

   Correct answer: (A) 50 m

   Distance = average velocity × time = ((20 + 0)/2)(5) = 50 m.

5. Q5medium

   A body starts from rest and moves with constant acceleration of 10 m/s^2. The distance it covers during the 3rd second of its motion is:

   • A15 m
   • B20 m
   • C25 m
   • D45 m
   Show answer & solution

   Correct answer: (C) 25 m

   Distance in nth second = u + (a/2)(2n − 1) = 0 + (10/2)(2×3 − 1) = 5 × 5 = 25 m.

6. Q6medium

   A projectile is launched with speed 20 m/s at 45° to the horizontal. Taking g = 10 m/s^2, its horizontal range is:

   • A20 m
   • B40 m
   • C45 m
   • D80 m
   Show answer & solution

   Correct answer: (B) 40 m

   Range R = u^2 sin(2θ)/g = (20)^2 × sin90° / 10 = 400/10 = 40 m.

7. Q7medium

   A projectile is thrown with speed 40 m/s at 30° to the horizontal. Taking g = 10 m/s^2, its maximum height is:

   • A10 m
   • B15 m
   • C20 m
   • D40 m
   Show answer & solution

   Correct answer: (C) 20 m

   Maximum height H = u^2 sin^2θ/(2g) = (40)^2 × (0.5)^2 / (2×10) = 400 × 0.25 / 20 = 20 m.

8. Q8easy

   Two trains move towards each other on parallel tracks at 60 km/h and 90 km/h. The magnitude of the velocity of the first train relative to the second is:

   • A30 km/h
   • B75 km/h
   • C120 km/h
   • D150 km/h
   Show answer & solution

   Correct answer: (D) 150 km/h

   For opposite motion the relative speed is the sum: 60 + 90 = 150 km/h.

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