Question

give answers
section A
Q6 b)
Q7
Q8
section C
Q3


please don't forget tommorow is my exam

Answer 1

(A) 6.(b) T=2s
frequency= 1/T
=1/2
=0.5

7. If there is no friction, all objects that are in motion will remain constantly in motion. hence, friction is necessary to oppose motion.

8.(I) make the object more streamlined
(ii) reduce forces acting on the surfaces
(iii) reduce contact b/w the surfaces
(Iv) by lubricating

(C) 3. m=5kg
1kg=10N
5kg=10×5 N
=50N
a=1m2
F= mg
=50×9.8
=490
P=F/A
=490/1
490N/m2 (or) 490Pa