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Mechanics (Resultant)

Author: Math ELS
Description:
Keywords: , , , , , , online teaching

Content:
Quiz:
1. If the two forces are equal then their resultant can be obtaines from the formula ..............
A) R = F1 %2b F2
B) R²=(F1)²%2b(F2)²
C) R = 2F cos (½ α)
D) R = 2F cos (α)

2. Two perpendicular forces of magnitudes 3N and 4N, then the magnitude of their resultant is .............. N
A) 5
B) 5√2
C) 5√3
D) 7

3. Two forces of magnitudes 5 gm.wt and 10 gm.wt , include an angle of measure 120° then the magnitude of their resultant is ..............gm.wt
A) 5
B) 10
C) 5√3
D) 5√2

4. Two forces of magnitudes 5N and 10N, include an angle of measure 120° then the angle between the resultant and the first force is ..............
A) 45°
B) 90°
C) 30°
D) 0°

5. Two forces their maximum resultant is 25 N, and their minimum resultant is 15 N, then the magnitdes of the forces are ...............
A) 20 N and 5 N
B) 10 N and 15 N
C) 15 N and 15 N
D) 12.5 N and 12.5 N

6. If the two intersecting forces are perpendicular, then their resultant is given by the rule: ..................
A) R = F1 %2b F2
B) R = 2 F1 F2 cos (½ α)
C) R² = F1² %2b F2²
D) R² = F1² %2b F2² %2b 2 F1 F2

7. If the resultant of two forces is R where R∈ [ 7 , 13 ], then the magnitudes of the two forces are ................ N
A) 7 and 13
B) 6 and 20
C) 7 and 20
D) 10 and 3

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