1 |
The sum of the magnitude of two forces acting at a point is 18 and the magnitude of their resultant is 12. If the resultant is at 90° with the force of the smaller magnitude then their magnitude are: |
3, 15
4, 14
5, 13
6, 12
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2 |
A motorist travels A to B at a speed at 40 km/h and returns at speed of 60 km/h. His average speed will be: |
40 km/h
48 km/h
50 km/h
60 km/h
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3 |
The velocity of a particle at an instant is 10 m/s and after 5 s the velocity of the particle is 20 m/s.The velocity 3s before in m/s is: |
8
4
6
7
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4 |
To get a resultant displacement of 10 m, two displacement vectors of magnitude 6 m and 8 m should be combined |
Parallel
Antiparallel
At angle 60°
Perpendicular to each other
|
5 |
The dot product of two vectors is negative when |
They are parallel vectors
They are anti-parallel vectors
They are perpendicular vectors
None of the above is correct
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6 |
If two non-zero vector ̅A̅ and ̅B are parallel to each other, then ̅A̅, ̅B is equal to |
Zero
AB
A + B
A - B
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7 |
If the dot product of two non-zero vectors vanishes the vectors will be |
In the same direction
Opposite to each other
Perpendicular to each other
Zero
|
8 |
Two forces of 10N and 15N are acting simultaneously on an object in the same direction. Their resultant is |
Zero
5N
25N
150N
|
9 |
Two forces are acting together on an object. The magnitude of their resultant is minimum when the angle between the force is. |
0°
60°
120°
180°
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10 |
A force of 10N is acting along y-axis its component along x-axis is |
10N
20N
100N
Zero N
|