Laws of Motion Test

Result

Laws of Motion Test - 58

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Weekly Quiz Competition

Question 1
4 / -1

A block of mass M is pulled along a horizontal frictionless surface by a rope of mass m. If a force P is applied at the free end of the rope, the force exerted bythe rope on the block will be

A
P

B

C

D

Solution
Question 2
4 / -1

A rope of length L is pulled by a constant force F. What is the tension in the rope at a distance x from the end where the force is applied?

A

B

C

D
Question 3
4 / -1

Three equal weights A, B and C of mass 2 kg each are hanging on a string passing over a fixed frictional pulley as shown in the figure. The tension in the string connecting weights B and C is

A
Zero

B
13 N

C
3.3 N

D
19.6 N

Solution
Question 4
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 5
4 / -1

Two rectangular blocks A and B masses 2 kg and 3 kg respectively are connected by a spring of spring constant 10.8 Nm^–1 and are placed on a frictionlesshorizontal surface. The block A was given an initial velocity of 0.15 ms-1 in the direction shown in the figure. The maximum compression of the spring duringthe motion is

A
0.01 m

B
0.02 m

C
0.05 m

D
0.03 m

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

Three blocks of masses m₁, m₂ and m₃ are connected by massless strings as shown on a frictionless table. They are pulled with a force T₃= 40 N . If m₁. = 10 kg, m₂ = 6 kg and m₃ = 4 kg, the tension T₂will be

A
20 N

B
40 N

C
10 N

D
32 N

Solution
Question 8
4 / -1

A 2 kg block 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 block A of mass 7 kg is placed on a frictionless table. A thread tied to it passes over a frictionless pulley and carries a body B of mass 3 kg at the other end. The acceleration of the system is (given g = 10 ms^–2)

A
100 ms^–2

B
3 ms^–2

C
10 ms^–2

D
30 ms^–2

Solution
Question 10
4 / -1

Three blocks of masses 2 kg, 3 kg and 5 kg are connected to each other with light string and are thenplaced on a frictionless surface as shown in the figure. The system is pulled by a force F =10 N, then tension T₁is equal to

A
1 N

B
5 N

C
8 N

D
10 N

Solution