1,600 fans buy tickets to watch their favorite band in concert. There are three shows. 1/4 watch the Thursday show. 10% watch the Friday show. How many watch the Saturday show?
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Answer:
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Step-by-step explanation:
11th
>Physics
>Laws of Motion
>Application of Newton's Laws of Motion
>A block of mass m kg is sli...
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A block of mass m kg is sliding from rest on an inclined rough surface of inclination ) as shown in the figure under the action of three forces, weight, normal and frictional force only The magnitude of forces are 20N,40N and 50N not necessarily in the same order The value of g is 10 m/s
2
Now match the physical quantity in List I with their magnitude in List II in SI unit and select the correct answer .
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List 1
Mass of the block (A)
Acceleration of block (A)
Net force acling on the block during motion
Coefficient of friction between inclined surface and block A is
μ
is
L
then value of
8μ
will be
List 2
2
4
5
10
Hard
Answer
Weight of block=mg
Normal acting on the block=μmg
Frictional force acting on block=μN=μmgcosθ
⟹mg>mgcosθ>μmgcosθ
Since 50N>40N>20N,
mg=50N
mgcosθ=40N
μmgcosθ=20N
⟹cosθ=
5
4
,
& μ=0.5
A) mg=50N
⟹m=5kg
B) a=gsinθ−
m
f
=6−
5
20
=2m/s
2
C) Net force acting on block during motion=ma=10N
D)μ=0.5
⟹8μ=4