Free Printable 8ET PHY VVN

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8ET PHY VVN

Total questions: 10

Worksheet time: 13mins

Name

Class

Date

Two forces are in the ratio of 5:2. The maximum and minimum of their resultants are in the ratio of

5:2

2:5

7:3

3:7

A body of mass 20Kg is suspended vertically by means of a string of length 10cm. The horizontal force required to pull the mass horizontally through 6cm

20Kg-wt

15Kg-wt

10kg-wt

none

According to tangent law, horizontal force F = ?

$mg\cos\theta$

$mgSin\theta$

$mg\cot\theta$

$mg\tan\theta$

If 11 forces each equal to 10N act on a particle and each force makes 30o with the next one, the resultant of all the forces is

110N

20N

$10\sqrt{3}N$

10N

Two equal forces act at a point. The square of their resultant is three times their product. Then angle between those vectors is ?

60^o

30^o

15^o

90^o

Two forces 4N and F act at 120o with each other. If their resultant is at right angles to 4N the value of F is ?

12N

The resultant of two forces 1N and P is perpendicular to 1 and equal to 1. Then value of P is

$\sqrt{2}$

If the resultant 'n' number of vectors of different magnitudes acting at a point is zero then the minimum possible value of 'n' is?

Two forces 3N and 4N act on a body of mass 5kg at right angles. The acceleration of the body is

7/5 ms^-2

1ms^-2

1/5 ms^-2

5/7 ms^-2

10.

'N' identical vectors act simultaneously on a particle each making an angle of $\frac{2\pi}{N}$ with the preceding one. Then their resultant is ?

zero

N times the magnitude of vector

1/N th of the force

None

100 %

8ET PHY VVN

Total questions: 10

Worksheet time: 13mins

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