Laws of Motion Test

Result

Laws of Motion Test - 35

Score
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Question 1
4 / -1

A

B

C

D

Solution
Question 2
4 / -1

Three blocks having equal mass of 2 kg are hanging on a string passing over a pulley as shown in figure. what will be the tension produced in a string connecting the blocks B and C

A
Zero

B
13.1 N

C
3.3 N

D
19.6 N

Solution
Question 3
4 / -1

A partly hanging uniform chain of length L is resting on a rough horizontal table. l is the maximum possible length that can hang in equilibrium The coefficient of friction between the chain and table is __________

A

B

C

D

Solution
Question 4
4 / -1

As shown in figure,the block of 2 kg at one end and the other of 3 kg at the other end of a light string are connected. It the system remains stationary find the magnitude and direction of the frictional force (g = 10 ms^–2)

A
20 N, downward on slope

B
20 N, upward on slope

C
10 N Downward on slope

D
10 N upward on slope

Solution
Question 5
4 / -1

A
(i) –p, (ii) –q

B
(i) –q, (ii) –r

C
(i) –r, (ii) –p

D
(i) –q, (ii) –p

Solution
Question 6
4 / -1

A car of mass 1000 kg travelling at 32 m/s clashes into a rear of a truck of mass 8000 kg moving in the same direction with a velocity of 4 m/s. After the collision the car bounces with a velocity of 8 ms^–1 The velocity of truck after the impact is ___________ m/s

A
8

B
4

C
6

D
9

Solution
Question 7
4 / -1

A Block of mass m = 2 kg is resting on a rough inclined plane of inclination 30^o as shown in figure. The coefficient of friction between the block and the plane is = 0.5 . What minimum force F should be applied perpendicular to the plane of block so that block does not slip on the plane ? (g = 10 ms^–2)

A
Zero

B
6.24N

C
2.68 N

D
4.3 N

Solution
Question 8
4 / -1

The upper half of an inclined plane of inclination θ is perfectly smooth while the lower half is rough A body starting from the rest at top come back to rest at the bottom, then the coefficient of friction for the lower half is given by

A

B

C

D

Solution
Question 9
4 / -1

A Block of mass m = 4 kg is placed over a rough inclined plane as shown in figure, The coefficient of friction between the block and plane is = 0.6. A force F = 10 N is applied on the block of an angle at 30^o The contact force between the block and the plane is __________

A
27.15 N

B
16.32 N

C
10.65 N

D
32.16 N

Solution
Question 10
4 / -1

A
F = ma

B
F = mg

C
F = 0

D
None of these