Laws of Motion Test

Result

Laws of Motion Test - 57

Score
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Weekly Quiz Competition

Question 1
4 / -1

The resultant of two forces 3P and 2P is R. If the first force is doubled then the resultant is also doubled. The angle between the two forces is

A
60°

B
120°

C
70°

D
180°

Solution
Question 2
4 / -1

The resultant of two forces, one double the other in magnitude, is perpendicular to the smaller of the two forces. The angle between the two forces is

A
60°

B
120°

C
150°

D
90°

Solution
Question 3
4 / -1

Two forces are such that the sum of their magnitudes is 18 N and their resultant is perpendicular to the smaller force and magnitude of resultant is 12 N. Then, themagnitudes of the forces are

A
12 N, 6N

B
13 N, 5N

C
10 N, 8 N

D
16 N, 2N

Solution
Question 4
4 / -1

A

B

C

D
Question 5
4 / -1

Which of the following is the correct order of forces?

A
Weak < Gravitational < Strong (nuclear) < electrostatic

B
Gravitational < Weak < Electrostatic < Strong

C
Gravitational < Electrostatic < Weak < Strong

D
Weak < Gravitational < Electrostatic < Strong
Question 6
4 / -1

A

B

C

D

Solution
Question 7
4 / -1

Which of the following groups of forces could be in equilibrium?

A
3 N, 4 N, 5 N

B
4 N, 5 N, 10 N

C
30 N, 40 N, 80 N

D
1 N, 3 N, 5 N
Question 8
4 / -1

A mass of 5 kg is suspended by a rope of length 2 m from a ceiling. A force of 50 N in the horizontal direction is applied at the mid-point of the rope. The angle made by the rope with the vertical, in equilibrium is

A
50°

B
60°

C
30°

D
45°

Solution
Question 9
4 / -1

If two forces of 5 N each are acting along X and Y axes, then the magnitude and direction of resultant is

A

B

C

D

Solution
Question 10
4 / -1

Three forces F₁, F₂ and F₃ together keep a body in equilibrium. If F₁ = 3 N along the positive x–axis,F₂ = 4 N along the positive y-axis, then the third forceF₃ is

A

B

C

D