What is the value of force measured by a force sensor lying on a plane ground if a block of mass 3 kg is kept on it and a normal upward tensile force of 5 Newton is applied on the block? (Take acceleration due to gravity=10m/s2)

What is the value of force measured by a force sensor lying on a plane ground if a block of mass 2 kg is kept on it and a normal upward tensile force of 4 Newton is applied on the block? (Take acceleration due to gravity=10m/s2)

A

15 Newton

B

20 Newton

C

16 Newton

D

24 Newton

Three blocks with masses m, 2 m and 3 m are connected by strings, as shown in the figure. After an upward force F is applied on block m, the masses move upward at constant speed v. What is the net force on the block of mass 2 m? (g is the acceleration due to gravity)

A

zero

B

2 m g

C

3 m g

D

6 m g

What is the value of force, measured by a force sensor placed on the wall; if a rigid block of mass 3kg is smashed against the wall with an acceleration of 5m/s2? (Take acceleration due to gravity=10m/s2)

A

15 Newton

B

20 Newton

C

16 Newton

D

0 Newton

Applying a force of 5 newtons on a wooden plank with mass m₁ kg, it accelerates with an acceleration of 10 ms^-2. Another plank of mass m₂ kg accelerates with an acceleration of 20 ms^-2 when the same force is applied. If both the planks are tied with each other and the same force is applied on them, what will be the acceleration?

A

6.67 ms^-2

B

1.67 ms^-2

C

5.67 ms^-2

D

4.67 ms^-2

The cages of five animals, Lion, Tiger, Elephant, Giraffe and Zebra were kept in a line one after the other, not necessarily in the same order. Lion’s cage is not kept at the last and giraffe’s cage is not kept at the first. Tiger’s cage was kept at the centre of the line. Zebra’s cage was kept after Lion’s but before Tiger’s cage. There was one cage kept between Tiger’s and Giraffe’s cage. Whose cage is kept at the last in the line?

A

Zebra

B

Lion

C

Elephant

D

Giraffe

Six boxes containing different items namely, Copy, Pen, pencil, Scissor, Tape and Paper, are kept in a straight line, one after the other, not necessarily in the same order. The box of Pen is kept at the third position in the line from the left end. The box of Paper is kept at the extreme right end. The box of Pencil is kept somewhere between box of pen and box of paper. The box of Tape is kept at the left of the box of Pen but at the right of the box of Copy, when counting from the left end. The box of scissor is not kept immediately next to Paper. Which box is kept at the second position from the right end?

A

Paper

B

Scissor

C

Pencil

D

Tape

A spring mass system is on a horizontal plane. Spring constant is 2N/m & mass of block is 2kg. The spring is compressed by 10cm and released. A small ball is released from a height of 2m above the block on the horizontal plane. At what time should the ball be left if the block is released from the extreme position at t=0, given that the ball has to fall on the block when the speed of block is maximum?

A

1.57s

B

0.94s

C

0s

D

0.63s

Certain information regarding Gravitational force and acceleration due to gravity is given below in points A, B and C. Find out which of them is/are true. The value of acceleration due to gravity (g) does not depend on altitude or depth. The value of acceleration due to gravity (g) is maximum at equator and minimum at poles. Gravitational force is the feeblest force in nature.

A

A and B

B

Only B

C

B and C

D

Only C

একজন ছাত্র পরীক্ষাগারে অভিকর্ষজ ত্বরণের মান 9.88 m/sec2 নির্ণয় করন। অপর দিকে যখন সে 0.01 kg ভরের কোনো বাটখারাকে স্প্রিং নিক্তিতে ঝুলিয়ে দিল তখন 0.0980 N বল দেখাচ্ছে। তার পরীক্ষা অভিকর্ষজ ত্বরণের ত্রুটি নির্ণয় কর।(A student measured the value of acceleration due to gravity in the laboratory as 9.88 m/sec2. On the other hand, when he hanged a mass of 0.01 kg in the spring balance, then he found 0.0980 N force. Calculate the percentage of error in the measured value of the acceleration due to gravity.)

A

-0.716%

B

-0.102%

C

0.816%

D

0.102%

E

-0.916%

When a body of mass M₁ is hanging freely and another of mass M₂ lying on a smooth inclined plane ($$\alpha $$) are connected by a light index tensile string passing over a smooth pulley, the acceleration of the body of mass M₁, will be given by

A

$$\frac{{{\text{g}}\left( {{{\text{M}}_1} + {{\text{M}}_2}\sin \alpha } \right)}}{{{{\text{M}}_1} + {{\text{M}}_2}}}{\text{m/sec}}$$

B

$$\frac{{{\text{g}}\left( {{{\text{M}}_1} - {{\text{M}}_2}\sin \alpha } \right)}}{{{{\text{M}}_1} + {{\text{M}}_2}}}{\text{m/se}}{{\text{c}}^2}$$

C

$$\frac{{{\text{g}}\left( {{{\text{M}}_2} + {{\text{M}}_1}\sin \alpha } \right)}}{{{{\text{M}}_1} + {{\text{M}}_2}}}{\text{m/se}}{{\text{c}}^2}$$

D

$$\frac{{{\text{g}}\left( {{{\text{M}}_2} \times {{\text{M}}_1}\sin \alpha } \right)}}{{{{\text{M}}_2} - {{\text{M}}_1}}}{\text{m/se}}{{\text{c}}^2}$$

What is the value of force measured by a force sensor lying on a plane ground if a block of mass 3 kg is kept on it and a normal upward tensile force of 5 Newton is applied on the block? (Take acceleration due to gravity=10m/s2)

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