Category: Physics

No.	Topics.	No.	Topics.
1.	Acceleration -FORCE AND MOTION	2.	Addition of Vectors (Rectangular Components
3.	CURRENT ELECTRICITY	4.	DAWN OF MODERN PHYSICS
5.	Displacement-time Graph-FORCE AND MOTION	6.	ELECTROMAGNETIC INDUCTION
7.	ELECTROMAGNETISM	8.	ELECTRONICS
9.	ELECTROSTATICS	10.	FORCE AND MOTION
11.	FORCE AND MOTION Displacement	12.	FORCE AND MOTION Velocity
13.	NUCLEAR PHYSICS	14.	Product of Vectors (Scalar Product
15.	ROTATIONAL AND CIRCULAR MOTION	16.	SPECTRA SPECTRA
17.	THERMODYNAMICS	18.	VECTORS AND EQUILIBRIUM
19.	WAVES

For the same vector in the previous question, as the angle increases from 0° to 90°, its vertical component…

increases
decreases
remains constant
first decreases then increases

An object is in equilibrium under the action of three forces. F1 = (10i) N, F2 = (-4i + 3j) N. The third force F3 must be…

(-6i – 3j) N
(6i + 3j) N
(-14i – 3j) N
(14i + 3j) N

A vector has a magnitude of 100 units. Its component along the y-axis is 50 units. The angle it makes with the x-axis is either 30° or…

120°
150°
210°
330°

A vector A makes an angle of 30° with the x-axis. A vector B makes an angle of 120° with the x-axis. If both have magnitude F, the magnitude of their resultant is…

2F
F
√2 F
√3 F

A force F1 has components (10, 20). A force F2 is added such that the resultant is (0, 30). The components of F2 must be…

(10, 10)
(-10, 10)
(10, 50)
(-10, 50)

The magnitude of the resultant vector from the previous question is…

3
6
2√3
2

The direction of the resultant vector from the previous question is…

45°
135°
225°
315°

A force of 10√2 N acts at an angle of 315°. Its components (Fx, Fy) are…

(10 N, 10 N)
(-10 N, -10 N)
(10 N, -10 N)
(-10 N, 10 N)

The resultant of vector A=10 units at 270° and B=10 units at 180° has a magnitude of…

0 units
10 units
20 units
14.1 units

To nullify the vector A = (-4i – 6j), one must add the vector…

(-4i – 6j)
(4i + 6j)
(4i – 6j)
(-4i + 6j)

A vector of magnitude 8 units lies in the 3rd quadrant, making an angle of 60° with the negative x-axis. Its components are approximately…

(-4, -6.9)
(-6.9, -4)
(4, 6.9)
(-6.9, 4)

Two forces F1=20N at 45° and F2=20N at 135° act on a body. The resultant force vector is…

40j N
28.3j N
20j N
20i N

If Rx = Rcosφ, then φ must be the angle between the vector R and the…

y-axis
x-axis
z-axis
origin

A person pulls a box with a force of 50 N at an angle of 30° above the horizontal. The effective force pulling the box horizontally is…

25.0 N
50.0 N
43.3 N
30.0 N

If vector R = A + B, and R = A – B in magnitude, then…

B must be a null vector
A and B must be perpendicular
A must be a null vector
A and B must be parallel

A plane flies at 100 m/s East while a crosswind blows at 100 m/s North. The plane’s resultant speed is approximately…

200 m/s
0 m/s
141 m/s
100 m/s

A force of 10 N acts at 30° and another force of 10 N acts at 150°. The resultant has a magnitude of…

20 N
10 N
0 N
10√3 N

A vector has components (1, √3). The angle it makes with the x-axis is…

30°
45°
60°
90°

The resultant of three vectors of magnitude 3, 4, and 5 can be zero if they are arranged…

along the sides of a right-angled triangle
along a straight line
in any random direction
It is not possible for the resultant to be zero

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