1. The force that brings the changes in the face while smiling is [ ]
a) Muscular force b) Electric force c) Gravitational force d) Friction
2. Pick the odd one among the following [ ]
a) Writing b) Washing
c) Pedalling a row boat d) Motion of moon around earth
3. While performing a physical activity muscles [ ]
a) Relax b) Lighten c) Remains normal d) None of these
4. The force which stops a moving ball on a rough surface is [ ]
a) Friction b) Gravitation c) Normal reaction d) Magnetic
5. A moving ball goes maximum distance on [ ]
a) Bandy surface b) Polished surface c) Rough surface d) Carpet
6. The direction of friction is [ ]
a) always along the direction of motion b) Always normal to the direction of motion
c) Always opposite to the relative motion d) None of these
7. When a book is kept on the table the forces acting are [ ]
a) Friction b) Gravitation c) Normal reaction d) Both b & c
Answers
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Answer:1-(a)
2-(d)
3-(d)
4-(a)
5-(a)
6-(c)
7-(b)
Explanation:
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