Laws of Motion Test

Result

Laws of Motion Test - 34

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Weekly Quiz Competition

Question 1
4 / -1

If the surfaces shown in figure are friction less, the ratio of T₁ and T₂ is _________________

A

B

C
1 : 5

D
5 : 1

Solution
Question 2
4 / -1

Three masses 1 kg, 6 kg and 3 kg are connected to each other with threads and are placed on a table as shown in figure. The acceleration with which the system is moving is _________ ms^–2 (g = 10 ms^–2)

A
Zero

B
1

C
2

D
3

Solution
Question 3
4 / -1

A rope which can withstand a maximum tension of 400 N hangs from a tree. If a monkey of mass 30 kg climbs on the rope in which of the following cases-will the rope break? (take g = 10 ms^–2 and neglect the mass of rope)

A
When the monkey climbs with constant speed of 5 ms^–1

B
When the monkey climbs with constant acceleration of 2 ms^–2

C
When the monkey climbs with constant acceleration of 5 ms^–2

D
When the monkey climbs with the constant speed of 12 ms^–1

Solution
Question 4
4 / -1

An object of mass 3 kg is moving with a velocity of 5 m/s along a straight path. If a force of 12 N is applied for 3 sec on the object in a perpendicular to its direction of motion. The magnitude of velocity of the particle at the end of 3 sec is

A
5

B
12

C
13

D
4

Solution
Question 5
4 / -1

Same forces act on two bodies of different mass 2 kg and 5 kg initially at rest. The ratio of times required to acquire same final velocity is ___________

A
5 : 3

B
25 : 4

C
4 : 25

D
2 : 5

Solution
Question 6
4 / -1

A
5 s

B
20 s

C
40 s

D
80 s

Solution
Question 7
4 / -1

A Block of mass 300 kg is set into motion on a friction less horizontal surface with the help of friction less pulley and a rope system as shown in figure. What horizontal force F should be applied to produce in the block an acceleration of 1 ms^–2?

A
150 N

B
100 N

C
300 N

D
50 N

Solution
Question 8
4 / -1

A body of mass m rests on horizontal surface. The coefficient of friction between the body and the surface is . If the body is Pulled by a force P as shown in figure, the limiting friction between body and surface will be

A

B

C

D

Solution
Question 9
4 / -1

Three blocks A , B, and C of equal mass m are placed one over the other, one on a smooth horizontal ground as shown in figure. Coefficient of friction between any two blocks of A, B and C is 0.5. What would be the maximum value of mass of block D so that the blocks A, B and C move without slipping over each other ?

A
3 m

B
5 m

C
6 m

D
4 m

Solution
Question 10
4 / -1

A train is moving along a horizontal track. A pendulum suspended from the roof makes an angle of 4^o with the vertical, The acceleration of the train is __________ ms^–2 (g = 10 ms^–2)

A
0.6

B
0.7

C
0.5

D
0.2

Solution