Question

1. By how much does the gravitational force between two masses change when the distance between two is halved:

a)1/4

b) 4

c) 2

d) 1/2

2. If the mass of a planet is halved, what happens to the acceleration due to gravity at the surface of the planet?

a) Doubled

b) Halved

c) Tripled

d) No change

3. If an object is moving in circular motion at a speed, what direction does the centripetal force act?

a) Up

b) Away from the centre

c) Towards the centre

d) At a tangent to the circumference

4. By how much does the gravitational force between two masses Change when the distance between them is doubled?

a) 1/2

b) 1/4

c) 4

d) 2

5. what is the centripetal acceleration of a ball on a string moving in a circular motion if the length of the string is halved?

a) a/2

b) a/4

c) a

d) 2a

6. If the mass of a planet is doubled, what happens to the acceleration due to gravity at the surface of the planet?

a) Halved

b) Tripled

c) No change

d) Doubled

7. What is the centripetal acceleration if the mass is doubled?

a) a/2

b) a

c) 2a

d) a/4

8. What direction does gravitational force act on a planet?

a) Away from the centre

b) Towards the centre

c) Up

d) At a tangent to the circumference

9. If an object is moving in circular motion at a constant speed, what direction is the centripetal acceleration?

a) At a tangent to the circumference

b) Towards the centre

c) Away from the centre

d) Up

10. If an object is moving in circular motion at a constant speed, what direction does the velocity travel?

a) Towards the centre

b) Away from the centre

c) At a tangent to the circumference

d) Up

11. What is the centripetal acceleration if the mass is halved?

a). 2a

b)  a/2

c)  a/4

d)   a

12. What is the centripetal acceleration of the ball if the velocity of the ball is halved?

a) 2a

b) a/4

c) a/2

d) 4a

13. By how much does the gravitational force between two masses change when the distance between them is halved?

a)  1/4

b)   4

c)   2

d).  1/2

14.what is the centripetal acceleration of a ball on a string moving in a circular motion if the length of the string is doubled?

a) a

b)  2a

c)  a/2

d)  a/4

15. By how much does the gravitational force between two masses change when one of the masses are doubled?

a) 1/2

b)  2

c)  4

d)  1/4

16. What is the centripetal acceleration of the ball if the velocity of the ball is doubled?

a)  a/4

b)  4a

c)  2a

d)  a/2

Answer 1

1) (b) 4

2) (b) half

3) (c) Towards the centre

4). ( b) 1/4

5). (d) 2a

6). (d) Double

7). (b). a

8). (b) towards the centre

9). (b). Towards the centre

10). (c) At a tangent to the circumference

11). (d) a

12). (b) a/4

13). (b) 4

14). (c) a/2

15). (b) 2

16). (b) 4a