Laws of Motion Test

Result

Laws of Motion Test - 76

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Weekly Quiz Competition

Question 1
4 / -1

Two forces of magnitude F have a resultant of the same magnitude F. The angle between the two forces is

A
45°

B
120°

C
150°

D
60°

Solution
Question 2
4 / -1

An object is subjected to a force in the north-east direction. To balance this force, a second force should be applied in the direction

A
North-East

B
South

C
South-West

D
West
Question 3
4 / -1

Two masses of 4 kg and 5 kg are connected by a string passing through a frictionless pulley and are kept on a frictionless table as shown in the figure. The acceleration of 5 kg mass is

A
49 m/s²

B
5.44 m/s²

C
19.5 m/s²

D
2.72 m/s²

Solution
Question 4
4 / -1

A block of mass M is attached to the lower end of a vertical spring. The spring is hung from a ceiling and has force constant value k. The mass is released from rest with the spring initially unstretched. The maximum extension produced in the length of the spring will be

A
1 Mg/k

B
2 Mg/k

C
4 Mg/k

D
Mg/2k

Solution
Question 5
4 / -1

Two bodies of mass 3 kg and 4 kg are suspended at the ends of massless string passing over a frictionless pulley. The acceleration of the system is (g = 9.8 m/s²)

A
4.9 m/s²

B
2.45 m/s²

C
1.4 m/s²

D
9.5 m/s²

Solution
Question 6
4 / -1

Three solids of masses m₁, m₂ and m₃ are connected with weightless string in succession and are placed on a frictionless table. If the mass m₃ is dragged with a force T, the tension in the string between m₂ and m₃ is

A

B

C

D

Solution
Question 7
4 / -1

A block of mass m₁ rests on a horizontal table. A string tied to the block is passed on a frictionless pulley fixed at the end of the table and to the other end of string is hung another block of mass m₂. The acceleration of the system is

A

B

C

D
Question 8
4 / -1

A 2 kg blocks is lying on a smooth table which is connected by a body of mass 1 kg by a string which passes through a pulley. The 1 kg mass is hanging vertically. The acceleration of block and tension in the string will be

A
3.27 m/s², 6.54 N

B
4.38 m/s², 6.54 N

C
3.27 m/s², 9.86 N

D
4.38 m/s², 9.86 N

Solution
Question 9
4 / -1

A light string passes over a frictionless pulley. To one of its ends a mass of 6 kg is attached. To its other end a mass of 10 kg is attached. The tension in the thread will be

A
24.5 N

B
2.45 N

C
79 N

D
73.5 N

Solution
Question 10
4 / -1

Two masses of 5 kg and 10 kg are connected to a pulley as shown in the figure. What will be the acceleration of the system (g = acceleration due to gravity)

A
g

B
g/2

C
g/3

D
g/4

Solution