Section A : True and False
1. Can a force always bring a stationary object in motion? Justify your answer by giving example.
2. What are the two states of an object?
3. “When net force on an object is zero then a body always remains at rest” . Is this statement is correct? Justify your answer.
4. Find net force on object and direction of motion
(a) 24N 40N (b) 30N 55N 65N 25N
5. What is the name of force which can replace all the forces on an object with same effect?
6. If forces 2N, 3N and 4N are two be applied on an object so that net force on object is maximum then how would you apply the forces and also find minimum net force?
7. If 2N, 4N and 5N forces are to be applied on object so that the net force is minimum then apply the forces and find the net force.
8. Find the value of G so that the object is at rest.
6N 4N
G
9. If two forces are applied then maximum force obtained is 20N and minimum force obtained is 4N the find the forces.
Answers
Ans : - all are not true and false
Explanation:
1. only unbalanced force always bring stationary object in motion. and if balanced force act on stationary body , it will remain stationary.
2. state of rest or state of rest or uniform motion and state of non uniform motion
3. false, if two equal and opposite forces act on body the body remains at rest while if two forces are same direction the body set in motion. thus while considering net force the direction of force must be taken in account.
4. unanswerable few things are missing
5. net or resultant force
6. a) they all must be in same direction
b) (2+3) - 4 = 1N
7. ( 2+4) - 5 = 1N
8. G = 10 N
9. F1 + F2 = 20 F1 - F2 = 4
after solving F1 = 12N F2 =8N
Answer:
Explanation:
6. a) they all must be in same direction
b) (2+3) - 4 = 1N
7. ( 2+4) - 5 = 1N
8. G = 10 N
9. F1 + F2 = 20 F1 - F2 = 4
after solving F1 = 12N F2 =8N.
Answer:
Matter exists in three states
i.e.solids liquids gases
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