Home
Class 11
PHYSICS
The number of base units for measuring p...

The number of base units for measuring physical quantities according to the SI system are ____
a) 1
b) 10
c) 7
d) 8

Text Solution

Verified by Experts

The correct Answer is:
B, D
From the free body diagram
R=4g cos 30^0`
`rarrR=4xx10xx sqrt3/2`
`20sqrt3`

`mu_2R+4a-p-4g sin 30^0`
`rarr 0.3(40)cos30^0+4a-p-40sin20^0`
=20

`R_1=2g cos 30^0 = 10 ........iii sqrt3`
`p+2a-mu_1R_1-2g sin 30^0=0`....iv `
From equation ii.
`6sqrt3+4a-p-20=0`

From equation iv
`p+2a+2sqrt3-10=10`
`6sqrt+6a+30+2sqrt3=0`
`rarr6a=30-8sqrt3`
`=30-13.85=1615`
`rarr a=16.15/6`
`=2.69=2.7m/s^2`
b. In this case 4 kg block will travel with more acceleration because, coefficient of friction is less than that of 2 kg. So, they will move separately. Drawin the free body diagram of 2 jkg mass only, it can be found that `a=2.4m/s^2`
Promotional Banner

Similar Questions

Explore conceptually related problems

Dimension of physical quantity in different unit system are equal.

Js^-1 is SI unit of ….. physical quantity.

Explain supplementary quantities and their unit of SI system.

Obtain the relation between the units of some physical quantity in two different systems o units.

Dimension of a physical quantity is M^(a)L^(b)T^(c) , then it is ......

If a,b,c,d be four disinct positive quantities in HP, then (a) a+dgtb+c (b) adgt bc

Consider following statement :- (A) any physical quantity may have more than one unit. (B) Any physical quantity have only one dimensional formula (C ) More than one physical quantities may have same dimension. (D) We can add & subtract only those expression having same dimension. Number of correct statements is :-

If the dimension of a physical quantity are given by M^a L^b T^c, then the physical quantity will be

A, B, C and D are four different physical quantities having different dimensions. None of them is dimensionless. But we know that the equation AD= C 1n(BD) holds true. Then which of the combination is not a meaningful quantity :-