Category: Physics

No.	Topics.	No.	Topics.
1.	CURRENT ELECTRICITY	2.	DAWN OF MODERN PHYSICS
3.	ELECTROMAGNETIC INDUCTION	4.	ELECTROMAGNETISM
5.	ELECTRONICS	6.	ELECTROSTATICS
7.	FORCE AND MOTION	8.	NUCLEAR PHYSICS
9.	ROTATIONAL AND CIRCULAR MOTION	10.	SPECTRA SPECTRA
11.	THERMODYNAMICS	12.	VECTORS AND EQUILIBRIUM
13.	WAVES

A boat moves with velocity (4i + 3j) m/s relative to the water, and the water moves with velocity (1i + 0j) m/s relative to the ground. The boat’s velocity relative to the ground is…

(4i + 4j) m/s
(3i + 3j) m/s
(5i + 3j) m/s
(5i + 4j) m/s

The angle of the velocity vector from the previous question, with respect to the positive x-axis, is approximately…

127°
143°
53°
37°

The components of a vector are given by Vx = Vcosθ and Vy = Vsinθ. This is true only if θ is the angle the vector makes with the…

positive x-axis
positive y-axis
negative x-axis
negative y-axis

A velocity vector has components (-30 m/s, +40 m/s). Its magnitude is…

70 m/s
10 m/s
50 m/s
1200 m/s

Three forces F1=(2i+3j), F2=(-4i+2j), F3=(2i-5j) act on a body. The body is in…

equilibrium
uniform acceleration
non-uniform acceleration
rotational motion

If the sum of two vectors is perpendicular to their difference, the two vectors must…

be perpendicular
have the same magnitude
be parallel
have different magnitudes

A force F has a magnitude of 40 N. Its component along an axis at 120° to it is…

20 N
-20 N
34.6 N
-34.6 N

A vector has an x-component of -25 units and a y-component of 45 units. The tangent of its reference angle is…

25/45
-0.555555556
45/25
-1.8

The x-component of the resultant of F1 = 100 N at 30° and F2 = 100 N at 150° is…

0 N
100 N
173.2 N
200 N

The y-component of the resultant of the two forces in the previous question is…

0 N
50 N
100 N
200 N

The direction of the resultant force in the previous question is approximately…

127°
143°
37°
53°

Two forces F1 = 8 N at 90° and F2 = 6 N at 180° act on a point. The magnitude of the resultant is…

14 N
2 N
10 N
48 N

A vector of magnitude 20 is added to a vector of magnitude 25. The magnitude of the resultant cannot be…

5
10
45
50

A displacement vector in the x-y plane has a magnitude of 50 m and makes an angle of 240° with the positive x-axis. Its components are…

(Dx=-25 m, Dy=-43.3 m)
(Dx=-43.3 m, Dy=-25 m)
(Dx=25 m, Dy=-43.3 m)
(Dx=43.3 m, Dy=-25 m)

To make the resultant of forces F1 = (5i + 5j) N and F2 = (-10i + 5j) N equal to zero, a third force F3 must be…

(+5i – 10j) N
(-5i + 10j) N
(+5i + 10j) N
(-5i – 10j) N

A force of 10 N has a horizontal component of 6 N. Its vertical component must be…

4 N
16 N
8 N
64 N

The direction of the vector R in the previous question is in the…

First Quadrant
Second Quadrant
Third Quadrant
Fourth Quadrant

If the resultant of two forces is zero, the forces must be…

perpendicular
equal in magnitude and opposite in direction
parallel and in the same direction
of unequal magnitude

A vector R has components Rx = 15 and Ry = -20. Its magnitude is…

35
5
-5
25

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