projectile motion - wordpress.com module presented herein is a sequel to the units on rotational...

The module presented herein is a sequel to

the units on Rotational motion and

Oscillations etc. posted earlier. The

contents of the document are intended to

give the student a revision of the topic

PROJECTILE MOTION in Class XI.

Projectile

Motion

Multiple Choice

Questions

IKGOGIA

Physicsbeckons.wordpress.com

physicswithikgogia Page 1

Q1. A ball is projected with velocity 10 m/sec at angle of 30o with the horizontal surface. The speed of the ball after 1 second will be (Use g=10m/sec2)

a. 5 m/sec b. 20 m/sec c. 8 m/sec d. 10 m/sec e. 12 m/sec

Q2. A ball is projected with velocity 10 m/sec at angle of 30o with the horizontal surface. The time taken by ball to reach the ground is

a. 1 sec

b. 2 sec

c. 3 sec

d. 4 sec

e. 5 sec

Q3. A ball is projected with velocity 10 m/sec at angle of 30o with the horizontal surface. The range of the projectile is

a. 10 m

b. 10√3m

c. 20√3m

d. 30√3m

e. 40√3m

Q4. A ball is projected with velocity 10 m/sec at angle of 30o with the horizontal surface. The maximum height attained by the projectile is

a. 5 m b. 10 m c. 15 m d. 20 m e. 25 m

Q5. A ball is projected with velocity 10 m/sec at angle of 30o with the horizontal surface. The angle made by the line joining point of projection with the point of maximum height is

a. tanˉ¹ 2/√3



b. tanˉ¹ 1/2√3 c. tanˉ¹ √3 d. tanˉ¹ 1/√3 e. tanˉ¹ √3/2

Q6. The angle of projection for the range of projectile to be equal to its maximum height is

a. θ=tanˉ¹ (2) b. θ=tanˉ¹ (3) c. θ=tanˉ¹ (4) d. θ=tanˉ¹(2/√3) e. θ=tanˉ¹(1/√3)

Q7.For a projectile fired with a certain velocity, the Maximum possible Range and the Maximum height attainable are related as

a. Rmax=2Hmax b. Rmax=Hmax/2 c. Rmax=3Hmax d. Rmax=Hmax e. Rmax=-Hmax

Q8. A ball projected at an angle θ, attains a maximum height H1 and if the ball is

projected at angle of (90-θ) and the maximum height attained by the ball is H2.

Then the range of projectile will be

a. R= √H1H2

b. R= √H1H2 /2

c. R= 2√H1H2

d. R= 3√H1H2

e. R= √H1H2/3

Q9. The motion of a projectile is described by the equation

y=ax - bx². The range of projectile is

a. a²/b²

b. a/2b

c. 2a/b

d. a/b



e. a/b²

Q10. A body is projected with kinetic energy E so as to attain maximum

horizontal range. Its potential energy at the highest point is

a. E

b. E/2

c. 2E

d. √2E

Q11. A gun with a muzzle velocity of 500 m/s shoots a bullet at a target 50m

away. To hit the target the gun should be aimed (g=10m/s²)

a. directly towards the target along the line joining the gun and bird

b. 10 cm high above the target.

c. 5 cm high above the target.

d. 5cm below the target.

Q12. For a body thrown horizontally from the top of a tower,

a. the time of flight depends on both h and v.

b. the horizontal Range depends only on v but not on h.

c. the time of flight and horizontal Range depends on h but not on v.

d. the horizontal Range depends on both v and h.

Q13. Two particles are projected with same velocity but at angles of projection

(45-θ) and (45+θ). Then their horizontal ranges are in the ratio of

a. 1:2

b. 2:1

c. 1:1

d. 90/2 θ



Q14. A body is projected horizontally from a height of 78.4m with a velocity

10m/s. The angle made by velocity vector with x axis after 4 seconds is

a. tanˉ¹3

b. tanˉ¹4

c. tanˉ¹5

d. tanˉ¹6

Q15. A body is projected vertically downwards with the velocity 5m/s from a

height of 60m. Its time of descent is

a. 2s

b. 3s

c. 4s

d. 5s

Q16. The acceleration of a projectile relative to another projectile is

a. -g

b. g

c. 2g

d. 0

Q17. An aeroplane flying horizontally at an altitude of 490m with a speed of

180km/h drops a bomb. The horizontal distance at which it hits the ground

is(g=9.8m/s²)

a. 500m

b. 1000m

c. 250m



d. 50m

Q18. A body projected with velocity 30m/s reaches its maximum height in 1.5s. Its

range is (g=10m/s²)

a. 45m

b. 108m

c. 45√3m

d. 54m

Q19. A body is thrown with the velocity (4i + 3j) m/s. Its maximum height is

(g=10m/s²)

a. 2.5m

b. 0.8m

c. 0.9m

d. 0.45m

Q20. A stone is projected horizontally with a velocity 9.8m/s from a tower of

height 100m. Its speed 1 s after projection is

a. 9.8m/s

b. 4.9m/s

c. 9.8√2m/s

d. 4.9√2m/s

ANSWERS

1. d 2. b 3. c 4. a 5. b 6. c 7. a 8. d 9. d 10. d 11. c 12d 13c

14. b 15b 16. d 17.a 18. c 19. d 20c

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