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MCQ: A group of interacting bodies on which no external force is acting is known as

1. sexasigmal system
2. iscolated system
3. SGS system
4. none of above

B

MCQ: When we walk or run, to push ground backward we need

1. inertia
2. position
3. friction
4. velocity

C

MCQ: If pressing force on sliding surfaces is greater, then friction will be

1. small
2. constant
3. zero
4. greater

D

MCQ: A force of 15 N moves a body with an acceleration of 3 ms−2. Its mass is

1. 10 kg
2. 8 kg
3. 12 kg
4. 5 kg

D

MCQ: Law of inertia is also known as newton's

1. 1st law of motion
2. 2nd law of motion
3. 3rd law of motion
4. both A and B

A