Physics 9 Chapter 2 - Kinamatics -21

Physics 9 Chapter 2 - Kinamatics -21

1. Galileo was the first scientist to notice that all the freely falling objects have the same............?

a) Velocity
b) Displacement
c) Speed
d) Acceleration

2. All freely falling objects have the same acceleration independent of their............?

a) Masses
b) Distances
c) Lengths
d) Areas

3. Who dropped various objects of different masses from the leaning tower of Pisa?

a) Galileo
b) Newton
c) Wohler
d) Einstein

4. Galileo dropped various objects of different ..........from the leaning tower of Pisa?

a) Areas
b) Masses
c) Cross-sections
d) Lengths

5. Where is leaning tower located?

a) France
b) Pisa
c) New York
d) London

6. What is the acceleration of freely falling bodies is called?

a) Gravitational acceleration
b) Uniform acceleration
c) Terminal acceleration
d) Positional acceleration

7. How is gravitational acceleration represented?

a) Letter a
b) Letter G
c) Letter d
d) Letter g

8. What is the SI unit of gravitational acceleration g?

a) Metre per second per second
b) Newton
c) Metre
d) Metre per second

9. What is the value of g on the surface of earth?

a) 10 ms^-1
b) 9 ms^-1
c) 11 ms^-1
d) 1.6 ms^-1

10. What is g for bodies moving down freely?

a) Negative
b) Variable
c) Constant
d) Positive

11. What is g for bodies moving upward?

a) Variable
b) Constant
c) Negative
d) Positive

12. What is the first equation of motion for freely falling bodies?

a) vf + vi = gt
b) 2gh = vf2 - vi2
c) h = vit
d) vf = vi + gt

13. What is the second equation of motion for freely falling bodies?

a) vf = vi + gt
b) vf + vi = gt
c) 2gh = vf2 - vi2
d) h = vit

14. What is the third equation of motion for freely falling bodies?

a) h = vit
b) 2gh = vf2 - vi2
c) vf = vi + gt
d) vf + vi = gt

15. A stone is dropped from the top of a tower. The stone hits the ground after 5 seconds. Find the height of the tower?

a) 125 m
b) 10 m
c) 2 m
d) 50 m

16. A stone is dropped from the top of a tower. The stone hits the ground after 5 seconds. Find the velocity with which the stone hits the ground?

a) 25 ms^-1
b) 2 ms^-1
c) 10 ms^-1
d) 50 ms^-1

17. A boy throws a ball vertically up. It returns to the ground after 5 seconds. Find the final velocity at maximum height reached by the ball?

a) 10 ms^-1
b) 0 ms^-1
c) 2 ms^-1
d) 25 ms^-1

18. A boy throws a ball vertically up. It returns to the ground after 5 seconds. Find the maximum height reached by the ball?

a) 31.25 m
b) 62.5 m
c) 2.5 m
d) 25 m

19. A boy throws a ball vertically up. It returns to the ground after 5 seconds. Find the velocity with which the ball is thrown up?

a) 2.5 ms^-1
b) 0.25 ms^-1
c) 25 ms^-1
d) 62.5 ms^-1

20. A train moves with a uniform velocity of 36 kmh-1 for 10s. Find the distance travelled by it?

a) 3.6 m
b) 360 m
c) 100 m
d) 26 m

This is more feedback!

This is the feedback!