Question

1. The maximum frictional force at which a body starts moving is [ ] a) Kinetic friction b) State friction c) Maximum static friction d) Rolling friction
2. Expression for maximum static friction is [ ]
a) s msf N   b) ms s f N    c) ms
s
N
f
  d) ms s f N   
3. Static friction is called as [ ] a) kinetic friction b) rolling friction c) self adjusting friction d) None of these
4. The coefficient of friction depends on [ ] a) Normal reaction b) Static friction c) Applied force d) None
5. If a body is placed on a rough surface, the value of static friction is [ ] a) zero b) Infinetly large c) Greater than d) None of these
6. Static friction depends on [ ] a) Normal reaction b) Weight of the body c) Speed of the body d) Both a and b
7. If coefficient of static friction is 0.6, mass of the block is 5 kg, the static friction, when the body is pulled by 20 N of force (g.10ms–2) [ ] a) 60 N b) 50 N c) 20 N d) 0 N
8. The maximum static friction value in the above question is [ ] a) 60 N b) 30 N c) 50 N d) 20 N [ ]
9. A body of mass 10 kg is resting on a horizontal surface. 0.4   the state friction is [ ] a) 6 N b) 4 N c) 0 N d) 2 N 10. If a body of mass 100 kg is an a rough surface. The maximum static friction value is   0.4  
[ ]
a) 100 N b) 200 N c) 300 N d) 400

Answer 1

Answer:

kinectic friction it start moving